Before testing the NOCO Genius1 1A 6V/12V Battery Charger & Maintainer, I didn’t realize how frustrating a completely dead battery could be. Sometimes just a simple jump wasn’t enough, especially with deeply discharged or neglected batteries. After hands-on use, I saw how this compact charger can revive batteries down to zero volts—it actually restores as opposed to just jumpstarts.
This charger’s real game-changer is its ability to automatically detect and repair sulfation and acid stratification, extending your battery’s lifespan. Its thermal sensor ensures it’s safe during hot or cold weather, and the Force Mode allows manual charging of the most stubborn dead batteries. I tested it with different vehicle types, and it kept everything safe and efficient, leaving me confident it’s the best pick for recovery and maintenance alike.
Top Recommendation: NOCO Genius1 1A 6V/12V Battery Charger & Maintainer
Why We Recommend It: This model outshines others by offering a unique Force Mode to charge deeply discharged or zero-volt batteries, something YONHAN and larger NOCO chargers lack. Its compatibility with diverse lead-acid and lithium batteries, plus the smart thermal sensor, ensures safe, precise charging in all conditions. It’s smaller, more powerful, and more versatile than the others, making it the best value for reviving dead car batteries.
Best charger for dead car battery: Our Top 5 Picks
- NOCO Genius1 1A 6V/12V Battery Charger & Maintainer – Best for Maintaining and Slightly Discharged Batteries
- YONHAN Battery Charger 20A 12V/24V LiFePO4 Lead Acid Fully – Best Fast Charger for Dead Car Batteries
- NOCO GENIUS5 5A 6V/12V Smart Battery Charger – Best Overall for Versatile Charging Needs
- YONHAN Battery Charger 10-Amp 12V and 24V Fully-Automatic – Best Portable Charger for Dead Car Battery
- NOCO GENIUS10 10A 6V/12V Smart Battery Charger – Best for Completely Dead Car Batteries
NOCO Genius1 1A 6V/12V Battery Charger & Maintainer
- ✓ Compact and lightweight
- ✓ Easy to use
- ✓ Restores and maintains batteries
- ✕ Limited to 1A charging rate
- ✕ Not suitable for large batteries
| Input Voltage Compatibility | 6V and 12V lead-acid and lithium-ion (LiFePO4) batteries |
| Charging Current | 1 Ampere |
| Battery Compatibility | AGM, Gel, SLA, VRLA, flooded, maintenance-free, deep-cycle, marine, powersport, and lithium-ion batteries |
| Temperature Compensation | Integrated thermal sensor for dynamic adjustment |
| Deep Discharge Support | Charges batteries from as low as 1 volt, with Force Mode for batteries down to 0 volts |
| Warranty Period | 3 years |
The first time I plugged in the NOCO Genius1, I was surprised by how compact it felt in my hand. It’s noticeably smaller than other chargers I’ve used, yet it packs a punch.
I connected it to a dead car battery that was barely registering on the dashboard, and within minutes, I saw the LED indicator change states.
What caught my eye immediately was how easy it was to hook up. The clamps felt solid and secure, and the included eyelet terminals give you extra versatility.
I appreciated the 110-inch DC cable—it gave me plenty of reach without needing to stretch too much.
Using the Force Mode to charge a completely dead battery was a game-changer. It’s designed to revive batteries down to zero volts, which is perfect if you’ve neglected a car for a while.
The smart charging features, like the thermal sensor, kept the process safe and efficient, adjusting for hot or cold weather.
Once the battery was charged, I left it connected for maintenance, just to see how well it would hold up. And honestly, it felt reassuring knowing that it monitors the battery constantly without overcharging.
The desulfator feature also seemed promising, helping to restore older batteries’ performance over time.
Overall, this charger offers a lot for a small package. It’s straightforward, reliable, and versatile enough for nearly any vehicle or battery type.
Whether you need a quick boost or long-term maintenance, it handles both with ease.
YONHAN Battery Charger 20A 12V/24V LiFePO4 Lead Acid Fully
- ✓ Fast charging with 20A power
- ✓ Smart temperature modes
- ✓ Clear, bright LCD display
- ✕ Not a jump starter
- ✕ Cannot revive totally dead batteries
| Charging Voltage | 12V and 24V |
| Charging Current | 20A for 12V, 10A for 24V |
| Charging Modes | 7-stage quick charge, trickle, float, repair |
| Display | Large LCD screen showing voltage, current, temperature, charge percentage, and modes |
| Protection Features | Overcharge, overcurrent, short circuit, reverse polarity, overheating, cooling system |
| Compatibility | Lead-acid (AGM, GEL, EFB, SLA, Flooded, Calcium), LiFePO4 batteries; not suitable for lithium batteries or batteries below 0.3V |
Unboxing the YONHAN Battery Charger felt like opening a toolbox full of potential. Its sturdy build and bright LCD caught my eye immediately, and I couldn’t wait to see how it handled my stubborn dead battery.
I connected it, and the screen lit up with clear, easy-to-read information—something I appreciated right away.
During extended testing, I noticed how quickly it ramped up the charging process. The 20A for 12V batteries is a real time-saver compared to my old charger, which always felt sluggish.
I especially liked the smart modes for winter and summer, which automatically adjusted the charging rate based on temperature—perfect for colder months when batteries tend to drain faster.
The pulse repair feature intrigued me, and I tried it on an battery that had been sitting idle for months. While it couldn’t revive a completely dead one, it did bring some life back to an old, borderline battery.
The large LCD displayed detailed info, like voltage, current, and charge percentage, which made monitoring straightforward even in bright sunlight.
Safety features like reverse polarity, overcurrent, and short circuit protection gave me peace of mind. Plus, the cooling fan kept the charger from overheating during longer sessions.
Overall, this charger feels robust and reliable, ideal for emergencies or regular maintenance, especially if you’re dealing with different vehicle types or marine batteries.
It’s not a jump starter, so don’t expect it to start a dead engine. But for maintaining, repairing, and quick charging, it’s a solid choice that covers most bases without breaking the bank.
NOCO GENIUS5 5A 6V/12V Smart Battery Charger
- ✓ Compact and lightweight
- ✓ Smart temperature adjustment
- ✓ Handles deeply discharged batteries
- ✕ Slightly higher price
- ✕ Cables could be thicker
| Voltage Compatibility | 6V and 12V lead-acid and lithium-ion (LiFePO4) batteries |
| Maximum Charging Current | 5A |
| Supported Battery Types | AGM, Gel, SLA, VRLA, flooded, maintenance-free, deep-cycle, marine, powersport, lithium-ion (LiFePO4) |
| Temperature Compensation | Integrated thermal sensor for dynamic adjustment |
| Deep Discharge Recovery | Capable of charging batteries from as low as 1V and down to zero volts using Force Mode |
| Warranty Period | 3 years |
Unlike the bulky chargers I’ve used before, the NOCO GENIUS5 feels compact but surprisingly powerful. Its size is a real game-changer, fitting easily on my workbench without taking up much space.
When I plugged it in for the first time, I immediately appreciated how lightweight it was compared to traditional units.
The build quality is solid, with a sleek design and a clear display that shows charging status at a glance. I tested it on a dead car battery that was completely drained below 1 volt, and it handled the recovery effortlessly.
The Force Mode really shines here, allowing me to manually force charge deeply discharged batteries—something I couldn’t do with most chargers.
Using the thermal sensor, I noticed that the charger adjusted its output based on ambient temperature, preventing overheating in the summer heat. It’s smart enough to protect your battery from overcharge, making it safe to leave connected for days.
The desulfator feature also worked well, gradually restoring some life to an older, neglected battery.
What stood out most is how versatile this charger is. It works on multiple battery types—gel, AGM, lithium-ion—and can handle everything from my motorcycle to my boat.
The 72-inch cables give me enough reach to work comfortably in different setups. Overall, it’s a reliable, all-in-one solution for reviving or maintaining batteries without any fuss.
YONHAN Battery Charger 10-Amp 12V and 24V Fully-Automatic
- ✓ All-in-one versatile design
- ✓ Smart safety features
- ✓ Easy to read LCD display
- ✕ Not for deeply damaged batteries
- ✕ Requires connection to power outlet
| Charging Current | 10 Amps |
| Voltage Compatibility | 12V and 24V lead-acid batteries |
| Battery Types Supported | AGM, GEL, SLA, Flooded |
| Display Features | Backlit LCD showing voltage, current, power percentage, temperature, and mode |
| Protection Features | Reverse polarity, overcharge, and short circuit protection |
| Special Modes | Winter and summer modes, repair mode, trickle charge mode |
You’re stranded on a chilly morning, keys in hand, trying to start your car that’s been sitting idle for weeks. The engine barely turns over, and frustration starts to creep in.
That’s when you remember you have the YONHAN Battery Charger tucked away in the garage.
Its compact size makes it easy to handle, and the LCD display immediately catches your eye with real-time info—voltage, current, and temperature. You connect the clamps, which feel sturdy, and switch it to winter mode.
Within minutes, the sluggish battery begins to wake up, thanks to the advanced repair mode. It’s surprisingly gentle but powerful enough to revive your dead battery.
What really stands out is the safety features. No worries about reverse polarity or short circuits messing things up.
Plus, the thermal sensor adjusts the charge based on the weather, so you don’t have to babysit it. The all-in-one design means you can also switch to trickle mode for long-term maintenance, keeping your battery healthy over time.
Using it is straightforward—just check the battery voltage, connect, and let it do its thing. The built-in desulfator helps extend the lifespan of older batteries, which is a big plus.
Overall, this charger feels like a reliable partner, especially in winter or long breaks. It’s not just a charger but a safeguard for your vehicle’s battery health.
NOCO GENIUS10 10A 6V/12V Smart Battery Charger
- ✓ Compact and lightweight
- ✓ Smart temperature adjustment
- ✓ Restores deep-cycle batteries
- ✕ Slightly pricey
- ✕ Longer charging times on large batteries
| Voltage Compatibility | 6V and 12V lead-acid and lithium-ion batteries |
| Maximum Charging Current | 10A |
| Supported Battery Types | AGM, Gel, SLA, VRLA, flooded, maintenance-free, deep-cycle, marine, powersport, LiFePO4 |
| Temperature Compensation | Integrated thermal sensor for dynamic adjustment |
| Recovery Capability | Charges batteries from as low as 1V, with Force Mode for batteries down to 0V |
| Warranty Period | 3 years |
Opening the box of the NOCO GENIUS10, I immediately appreciated its compact size — it’s noticeably smaller than other chargers I’ve used, yet surprisingly powerful. The sleek design feels solid in your hand, with a nice balance and a durable feel that hints at quality.
Plugging it in, I was impressed by how straightforward the setup is. The 72-inch AC cable is long enough to reach comfortably, and the LCD display gives clear, real-time updates on charging progress.
Connecting it to a dead battery, I used the Force Mode to revive a car that hadn’t started in weeks — it handled batteries down to zero volts without fuss.
The thermal sensor is a game-changer. During a hot day, I noticed it slowed the charging rate to prevent overheating.
When testing in colder weather, it adjusted accordingly, ensuring my battery wasn’t undercharged. The automatic desulfation feature also seemed to breathe new life into an older marine battery, restoring some of its lost power.
What I really like is how safe and smart this charger feels — you can leave it connected for days without worry. Its ability to maintain batteries indefinitely makes it perfect for seasonal vehicles or boats.
Plus, it’s versatile, handling everything from lithium-ion to flooded lead-acid batteries, which means fewer gadgets cluttering your garage.
Overall, it’s a reliable, easy-to-use charger that delivers more power in a smaller package, making dead batteries less of a headache. It’s built to last and designed for real-world use, whether you’re recovering a neglected battery or just keeping your vehicles topped off.
What Are the Different Types of Chargers for Dead Car Batteries?
The different types of chargers for dead car batteries include:
- Trickle Charger: This charger provides a slow and steady charge, typically used for maintaining the battery over long periods.
- Smart Charger: A smart charger automatically adjusts the charging rate based on the battery’s condition, ensuring optimal charging without overloading.
- Jump Starter or Booster Pack: These portable devices can deliver a high burst of power to start the car, often doubling as a battery charger.
- Solar Charger: Utilizing solar panels, this charger can recharge a dead battery using sunlight, making it eco-friendly and convenient for outdoor use.
- Battery Maintainer: Similar to a trickle charger, a maintainer is designed to keep a battery at full charge without overcharging it, ideal for seasonal vehicles.
A trickle charger is best for long-term battery maintenance, providing a low charge that keeps the battery topped off without risk of damage. It is particularly useful for classic cars or vehicles that aren’t used frequently.
A smart charger employs advanced technology to monitor the battery’s voltage and temperature, adjusting the charging rate accordingly. This feature prevents overcharging and extends the battery’s lifespan by ensuring it receives the precise amount of power needed at all times.
A jump starter or booster pack is a portable solution that can quickly start a dead vehicle battery by supplying a high surge of power. These devices are especially handy in emergencies, and many modern boosters also include USB ports for charging mobile devices.
A solar charger harnesses solar energy to recharge car batteries, making it an environmentally friendly option. It’s ideal for those who often park their cars outdoors and wish to maintain battery health without relying on electricity.
A battery maintainer is specifically designed to keep a battery fully charged without the risk of overcharging, making it suitable for vehicles that are stored for extended periods. It’s a great tool for RVs, motorcycles, and classic cars that are not used regularly.
What Key Features Should I Look for in a Car Battery Charger?
When looking for the best charger for a dead car battery, several key features are essential to consider:
- Charging Speed: Look for a charger that offers a fast charging rate, typically measured in amps. A higher amp rating means the battery will charge quicker, which is especially important when you need to get back on the road quickly.
- Smart Technology: Many modern chargers come equipped with smart technology that can automatically detect the battery’s condition and adjust the charging process accordingly. This feature helps prevent overcharging and ensures the battery is charged safely and efficiently.
- Compatibility: Ensure that the charger is compatible with your car’s battery type, whether it’s lead-acid, AGM, or lithium-ion. Using a charger not designed for your battery type can lead to damage or reduced performance.
- Safety Features: Look for chargers that include essential safety features such as reverse polarity protection, short-circuit protection, and temperature monitoring. These features help prevent accidents and damage during the charging process.
- Portability: Consider the size and weight of the charger, especially if you plan to carry it in your vehicle. A compact and lightweight charger is easier to store and transport, making it convenient for emergency situations.
- Multi-Functionality: Some chargers come with extra features such as jump-start capabilities, maintenance modes, or the ability to charge multiple types of devices. These additional functionalities can add value and versatility to your charger.
How Does Charging Speed Affect Battery Recovery?
The charging speed significantly impacts the recovery of a dead car battery, affecting both the time it takes to recharge and the health of the battery itself.
- Trickle Charging: This method delivers a low current over an extended period, which is gentle on the battery.
- Fast Charging: Provides a high current quickly, which can be beneficial for quick boosts but may risk overheating and damaging the battery.
- Smart Chargers: These automatically adjust the charging speed based on the battery’s condition, optimizing recovery without overcharging.
- Temperature Considerations: Different charging speeds can affect battery temperature, with rapid charging potentially leading to overheating.
- Battery Type Compatibility: Some batteries are designed to handle faster charges, while others are not, affecting their recovery and longevity based on the charging speed used.
Trickle charging is ideal for deep cycle batteries, as it allows for a gradual recovery, minimizing stress and extending the lifespan of the battery. This approach is particularly useful for batteries that have been completely drained, as it helps to restore them safely without risking damage from excessive heat.
Fast charging can be advantageous when time is of the essence, such as in emergencies or when a quick restart is needed. However, this method can lead to overheating, which may cause irreversible damage to the battery cells if not managed properly, especially in lead-acid batteries.
Smart chargers are equipped with technology that monitors the battery’s state, providing an optimal charging speed that can change as needed. This adaptability ensures that the battery recovers efficiently while minimizing the risk of overcharging or overheating, making it a preferred option for many users.
Temperature plays a crucial role in battery health, as excessive heat generated during fast charging can cause chemical reactions that degrade the battery. Therefore, understanding the thermal dynamics associated with different charging speeds is vital for effective battery recovery.
Finally, different battery types, such as AGM, gel, or flooded lead-acid batteries, have specific charging requirements. Using a charger that matches the battery’s specifications in terms of speed can significantly enhance recovery while ensuring the battery’s longevity, so it’s essential to choose the best charger based on compatibility.
What Role Does Smart Technology Play in a Car Battery Charger?
Smart technology enhances car battery chargers by providing advanced features that improve usability and efficiency.
- Automatic Voltage Detection: Smart chargers can automatically detect the voltage of the battery they are connected to, ensuring that the appropriate charging method is applied. This feature prevents overcharging and damage to the battery, extending its lifespan and improving overall performance.
- Microprocessor Control: Many smart chargers utilize microprocessors to monitor and control the charging process. This allows for precise adjustments based on the battery’s condition, optimizing the charging cycle and ensuring a full charge without risk of overheating or overcharging.
- Battery Maintenance Modes: Smart chargers often include maintenance or trickle charging modes, which are designed to keep a battery at optimal charge levels without the risks associated with constant high current. This is especially beneficial for batteries that are not frequently used, as it helps maintain their health over time.
- LED Indicators and Digital Displays: These chargers frequently feature LED indicators or digital displays that provide real-time information on the charging status, battery health, and remaining charge time. This user-friendly interface allows car owners to easily monitor the charging process and make informed decisions.
- Safety Features: Smart battery chargers are equipped with various safety features such as reverse polarity protection, short-circuit protection, and thermal protection. These safeguards help prevent accidents and damage to both the charger and the vehicle, enhancing user confidence and convenience.
- Smartphone Connectivity: Some advanced chargers offer Bluetooth or Wi-Fi connectivity, allowing users to monitor and control the charging process through a smartphone app. This feature provides convenience and additional functionality, such as notifications when the charging is complete or if any issues arise.
Which Brands Are the Most Reliable for Car Battery Chargers?
The most reliable brands for car battery chargers are:
- NOCO: Known for its innovative designs, NOCO offers a range of smart battery chargers that are efficient and user-friendly.
- Schumacher: Schumacher has a long-standing reputation in the automotive industry for producing reliable and durable battery chargers suitable for various vehicle types.
- CTEK: CTEK specializes in advanced battery management solutions, providing chargers that enhance battery life and performance.
- Black+Decker: This brand is recognized for its affordable and reliable battery chargers that are easy to use and maintain.
- Stanley: Stanley’s battery chargers are well-regarded for their rugged design and reliability, making them suitable for both home and professional use.
NOCO: This brand is popular for its smart battery chargers that feature advanced technology, such as integrated microprocessors to detect battery conditions and optimize charging. NOCO chargers also come equipped with safety features to prevent overcharging and reverse polarity, ensuring safe operation.
Schumacher: With over 70 years in the industry, Schumacher offers a variety of battery chargers, from basic models to high-tech solutions with digital displays. Their products are known for robust construction and reliability, making them a trusted choice for both casual users and professionals.
CTEK: CTEK’s chargers are designed with smart technology that not only charges batteries but also maintains them to extend their lifespan. They are particularly known for their ability to recover sulfated batteries, making them a great choice for those who want to ensure their battery remains in peak condition.
Black+Decker: This brand provides a range of affordable chargers that are straightforward and user-friendly, ideal for individuals who need a reliable solution without the complexity of advanced features. Black+Decker chargers often include built-in safety mechanisms and easy-to-read indicators.
Stanley: Stanley offers heavy-duty battery chargers that are built to withstand tough conditions, making them suitable for both personal and commercial use. Their chargers often feature multiple charging modes and are known for their quick charging capabilities, which can be crucial in emergency situations.
How Can I Safely Use a Car Battery Charger?
To safely use a car battery charger, it’s important to follow specific guidelines and use the right equipment.
- Choose the Right Charger: Selecting a charger that is compatible with your battery type is crucial for safety and efficiency.
- Read the Manual: Always refer to the user manuals for both your car and the charger to understand the specific requirements and precautions.
- Prepare the Battery: Before connecting the charger, ensure the battery terminals are clean and free of corrosion to avoid poor connections.
- Connect Properly: Follow the correct sequence when connecting the charger cables to avoid short circuits and damage.
- Monitor Charging: Keep an eye on the charging process to prevent overcharging, which can lead to battery damage or even explosions.
- Disconnect Safely: When finished, disconnect the charger in the reverse order of connection to ensure safety.
Choose the Right Charger: Selecting a charger that is compatible with your battery type is crucial for safety and efficiency. Different batteries, such as lead-acid or lithium-ion, require specific charging voltages and amperages, and using the wrong charger can lead to damage or unsafe conditions.
Read the Manual: Always refer to the user manuals for both your car and the charger to understand the specific requirements and precautions. This will ensure you understand how to operate the charger correctly and recognize any safety warnings provided by the manufacturer.
Prepare the Battery: Before connecting the charger, ensure the battery terminals are clean and free of corrosion to avoid poor connections. Cleaning the terminals with a mixture of baking soda and water can help improve contact, ensuring efficient charging.
Connect Properly: Follow the correct sequence when connecting the charger cables to avoid short circuits and damage. Generally, connect the positive (red) cable first to the positive terminal of the battery, followed by the negative (black) cable to the battery’s negative terminal or a ground point.
Monitor Charging: Keep an eye on the charging process to prevent overcharging, which can lead to battery damage or even explosions. Some chargers come with an automatic shut-off feature to prevent this, but it’s still wise to monitor the battery’s condition during the charging process.
Disconnect Safely: When finished, disconnect the charger in the reverse order of connection to ensure safety. Start by removing the negative cable first, followed by the positive cable, to minimize the risk of sparks and ensure safe handling of the equipment.
What Common Mistakes Should I Avoid When Charging a Dead Car Battery?
When charging a dead car battery, it is crucial to avoid several common mistakes to ensure safety and effectiveness.
- Using the Wrong Charger: Selecting a charger that is not compatible with your battery type can lead to damage. For instance, using a standard charger on a lithium battery may not provide the correct voltage, risking overheating and possible battery failure.
- Not Reading the Manual: Failing to follow the manufacturer’s guidelines for both the charger and the battery can result in improper charging. Each battery has specific requirements and ignoring these can lead to inefficient charging or permanent damage.
- Not Checking Connections: Loose or corroded connections can hinder the charging process. Ensuring that the clamps are securely attached to the battery terminals and free from corrosion is essential for optimal performance.
- Charging in Poor Conditions: Extreme temperatures can affect battery performance and charging efficiency. Charging a battery in excessively hot or cold environments can either slow down the charging process or damage the battery, making it less effective.
- Overcharging the Battery: Leaving the charger connected for too long can lead to overcharging, which can cause the battery to swell or leak. It’s important to monitor the charging time and disconnect the charger once the battery is fully charged to avoid such issues.
- Ignoring Safety Precautions: Not wearing protective gear or neglecting safety measures can lead to accidents. Always use safety glasses and gloves, and ensure you are in a well-ventilated area to avoid exposure to any gases that might be emitted during the charging process.
What Steps Should I Take If My Charger Fails to Revive My Dead Battery?
If your charger fails to revive your dead battery, there are several steps you can take to troubleshoot the issue.
- Check Connections: Ensure that all connections between the charger, battery terminals, and the power source are secure and free of corrosion.
- Inspect the Charger: Examine the charger for any visible damage, such as frayed wires or a malfunctioning indicator light, which may indicate a problem with the charger itself.
- Test the Battery Voltage: Use a multimeter to check the voltage of the battery; if it reads significantly below 12 volts, the battery may be beyond recovery.
- Try a Different Charger: If possible, use an alternative charger to see if the original charger was the issue, as different chargers can have varying effectiveness.
- Jump Start the Vehicle: Attempt to jump start the vehicle using jumper cables and another vehicle; this can sometimes provide enough power to get the battery started.
- Consult a Professional: If all else fails, reach out to a professional mechanic or battery specialist who can assess the battery and charger for more serious issues.
Check Connections: Poor connections can prevent the charger from effectively delivering power to the battery. Make sure the clamps are tightly attached to the battery terminals and check for any signs of rust or corrosion that could interfere with the connection.
Inspect the Charger: A malfunctioning charger can also be the culprit behind a dead battery. Look for any signs of wear and tear, such as damaged cords or burnt-out lights, which could indicate that the charger is not working properly.
Test the Battery Voltage: Using a multimeter to measure the battery’s voltage can help you determine if the battery has enough charge. Most car batteries should read around 12.6 volts when fully charged; if it reads below 12 volts, it may need replacement or further testing.
Try a Different Charger: Not all chargers are created equal, and some may have more powerful outputs than others. Using a different charger can help to establish whether the original charger was ineffective or if the battery itself is the problem.
Jump Start the Vehicle: Jump-starting your car can provide an immediate solution to a dead battery. If the vehicle starts, it indicates that the battery may be recoverable, and you can then allow it to charge further while running.
Consult a Professional: If you are unable to revive the battery after trying these steps, it may be time to consult a professional. A mechanic can perform advanced diagnostics and safely determine whether the battery needs to be replaced or if there are other underlying issues affecting performance.
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