Energizer NiMH Battery Charger Manual: A Comprehensive Guide
Energizer provides reliable NiMH charging solutions, with models like CHVCM4E and CHVCM4, designed for AA and AAA rechargeable batteries, ensuring optimal performance.
Energizer’s line of Nickel-Metal Hydride (NiMH) battery chargers represents a commitment to powering your devices efficiently and sustainably. These chargers are specifically engineered to revitalize rechargeable AA and AAA NiMH batteries, offering a convenient and cost-effective alternative to disposable batteries.

Whether you need a quick power boost with the 1-hour rapid charger, or a standard 5-hour charge, Energizer offers a solution to fit your needs. The chargers, such as the CHVCM4E and CHVCM4 models, are designed for ease of use and reliable performance. Proper charging is crucial for maximizing the lifespan and performance of your NiMH batteries, and Energizer chargers are built to deliver just that.
This manual provides a comprehensive guide to understanding, operating, and maintaining your Energizer NiMH charger, ensuring you get the most out of your rechargeable battery investment.
Understanding NiMH Battery Technology

Nickel-Metal Hydride (NiMH) batteries are a popular choice for rechargeable power due to their higher energy density and reduced environmental impact compared to older technologies. Unlike nickel-cadmium (NiCd) batteries, NiMH batteries do not contain toxic cadmium, making them a more eco-friendly option.
NiMH batteries operate by utilizing a chemical reaction between hydrogen-absorbing alloys and nickel oxide hydroxide. This process allows for efficient storage and release of electrical energy. Proper charging is vital; overcharging can lead to reduced battery life, while undercharging results in diminished capacity.
Energizer chargers are designed to optimize this charging process, preventing damage and maximizing the performance of your NiMH batteries. Understanding the nuances of NiMH technology ensures you can effectively utilize and maintain these rechargeable power sources.
Charger Models: CHVCM4E & CHVCM4
Energizer offers two closely related NiMH chargers: the CHVCM4E and the CHVCM4. Both models share core functionality, providing efficient charging for AA and AAA rechargeable batteries. They are designed with a compact black finish, measuring 75 x 32 x 115mm, making them suitable for home or travel use.
The primary difference lies in the included accessories. While both chargers deliver rapid 1-hour charging for AA batteries, some packages include a starter set of Energizer NiMH batteries – typically 6 AA and 4 AAA – offering immediate usability.

Both the CHVCM4E and CHVCM4 are designated as “Value” or “Maxi” chargers, indicating a balance of performance and affordability. They are engineered to safely and effectively charge 2 or 4 batteries simultaneously, providing a convenient solution for powering your devices.

Key Features of Energizer 1-Hour Chargers
Energizer’s 1-hour chargers, models CHVCM4E and CHVCM4, are engineered for speed and convenience. A standout feature is their ability to fully charge AA NiMH batteries in approximately 60 minutes, significantly reducing downtime. These chargers accommodate both AA and AAA rechargeable batteries, offering versatility for various devices.
They can simultaneously charge up to four batteries – either two AA or four AAA, or a combination thereof – maximizing efficiency. The chargers incorporate safety mechanisms to prevent overcharging, ensuring battery longevity and user safety.
The compact design, measuring 75 x 32 x 115mm, makes them ideal for travel or limited space. Furthermore, bundled kits often include Energizer NiMH batteries, providing an all-in-one solution for your power needs. These chargers truly live up to their name, delivering rapid power when you need it most.

Battery Compatibility: AA and AAA NiMH
Energizer NiMH chargers, specifically the CHVCM4E and CHVCM4 models, are designed exclusively for use with Nickel-Metal Hydride (NiMH) rechargeable batteries. It is crucial to only charge NiMH batteries, as attempting to charge other battery types could lead to leakage, rupture, or even explosion – posing a significant safety hazard.
These chargers demonstrate full compatibility with both AA and AAA sized NiMH batteries, offering flexibility for powering a wide range of devices. They can accommodate up to four batteries at a time, allowing for simultaneous charging of multiple batteries.
Energizer often bundles these chargers with their own high-quality AA and AAA NiMH batteries, providing a convenient and reliable power solution. Always verify the battery type before charging to ensure optimal performance and safety.
Charging Times & Performance
Energizer NiMH chargers offer versatile charging options to suit your needs. The 1-hour chargers, like the CHVCM4E, live up to their name, delivering a full charge for AA batteries in approximately 60 minutes. However, charging times can slightly vary depending on the specific NiMH battery’s capacity and condition.
For users who aren’t in a rush, a standard charging mode of 5 hours is also available. This slower charge can potentially extend the overall lifespan of the batteries. The chargers are capable of simultaneously charging two or four AA or AAA NiMH batteries, maximizing efficiency.
Consistent performance is a hallmark of Energizer chargers, ensuring your batteries are reliably powered and ready for use. Remember to use compatible NiMH batteries for optimal results.
Standard Charging (5 Hours)
The 5-hour standard charging mode on your Energizer NiMH charger provides a gentler, more conservative charging cycle. This method is ideal for maximizing the long-term health and lifespan of your rechargeable batteries. While it takes longer than rapid charging, it minimizes stress on the battery cells.
During standard charging, the charger delivers a lower current, allowing the batteries to fully saturate without overheating. This is particularly beneficial for batteries that are frequently used or stored for extended periods. The charger can accommodate two to four AA or AAA NiMH batteries simultaneously in this mode.

Although the stated charging time is 5 hours, slight variations may occur based on battery capacity and ambient temperature. Consistent use of the standard charging mode contributes to sustained battery performance.
Rapid Charging (1 Hour)
The Energizer 1-hour charger truly lives up to its name, offering a remarkably fast charging solution for your NiMH AA and AAA rechargeable batteries. This rapid charging mode delivers a full charge in approximately 60 minutes, making it perfect when you need power quickly.
However, it’s important to note that rapid charging involves a higher current flow, which can generate more heat. The charger is designed to manage this heat effectively, but frequent exclusive use of rapid charging may slightly reduce the overall lifespan of the batteries compared to standard charging.
The charger can handle up to four AA or two AAA batteries during a rapid charge cycle. Ensure batteries are correctly inserted for optimal performance. This mode is ideal for batteries used in high-drain devices.
Safety Precautions & Warnings
Important safety guidelines must be followed when using your Energizer NiMH battery charger. Only charge Nickel Metal Hydride (NiMH) rechargeable batteries; attempting to charge other battery types – such as alkaline, lithium, or carbon-zinc – could lead to leakage, rupture, or even explosion, posing a serious hazard.
Never disassemble the charger. Doing so risks electric shock and voids any warranty. Do not expose the charger to extreme temperatures or moisture. Always unplug the charger before cleaning. Inspect the charger and batteries for damage before each use; do not use damaged components.
Keep out of reach of children. This charger is intended for indoor use only. Ensure proper ventilation during charging. If you notice any unusual smells, sounds, or smoke, immediately disconnect the charger and cease use.

Proper Battery Insertion
Correct battery insertion is crucial for effective charging and to prevent damage to both the charger and the batteries. Ensure the batteries are NiMH rechargeable types, specifically AA or AAA, as indicated by the charger’s specifications. Observe the polarity markings (+ and -) inside the battery compartments and align the battery ends accordingly.
Insert batteries firmly and completely into the slots. Improperly seated batteries may not make proper contact, resulting in incomplete charging or the charger failing to recognize them. Do not force batteries into the compartments. If resistance is felt, double-check the polarity and battery type.
The Energizer charger is designed to accommodate 2 or 4 batteries simultaneously. Ensure an even number is used for optimal performance. Avoid mixing old and new batteries, or batteries with different charge levels, during charging.
LED Indicator Guide
The Energizer NiMH charger utilizes LED indicators to communicate the charging status of your batteries. A flashing LED generally signifies that the batteries are currently being charged. The color of the flashing LED may vary depending on the model, but typically indicates active charging.
Once the batteries are fully charged, the LED indicator will typically turn to a solid light, often green. This indicates that the charging process is complete and the batteries are ready for use. Some models may switch off the LED entirely when fully charged.
If the LED blinks rapidly or displays a different color (like red), it may indicate a problem, such as improperly inserted batteries or a battery that is not rechargeable. Refer to the troubleshooting section for further assistance.
Troubleshooting Common Issues
Charger Not Recognizing Batteries: If the Energizer charger doesn’t initiate charging, ensure batteries are correctly inserted, observing proper polarity (+/-). Try different batteries to rule out a faulty battery. Clean the battery contacts on both the batteries and within the charger with a dry cloth.
Slow Charging Times: Extended charging times can occur with older or low-capacity NiMH batteries. Verify you’re using compatible rechargeable batteries. Avoid mixing old and new batteries. Ensure the charger is connected to a functioning power outlet.

If issues persist, disconnect the charger and allow it to cool down before attempting to charge again. Do not attempt to disassemble or repair the charger yourself; contact Energizer support for assistance.
Charger Not Recognizing Batteries
If your Energizer NiMH charger fails to initiate a charging cycle, the first step is to meticulously verify correct battery insertion. Ensure each battery’s positive (+) and negative (-) terminals align with the markings inside the charging slots. A misaligned battery won’t establish a connection.
Next, test with a different set of known-good NiMH batteries. This isolates whether the problem lies with the charger or the batteries themselves. Inspect both the battery contacts on the batteries and within the charger compartment. Dust or corrosion can impede conductivity.
Gently clean these contacts with a clean, dry cloth. Avoid using liquids. If the issue continues, try a different power outlet to rule out a power supply problem.
Slow Charging Times
Experiencing prolonged charging times with your Energizer NiMH charger can stem from several factors. Firstly, confirm you’re using compatible NiMH batteries; attempting to charge other battery types will likely result in slow or no charging. Secondly, battery capacity plays a role – higher capacity batteries naturally take longer to fully charge.
If using the standard 5-hour charging mode, ensure the batteries aren’t already partially charged, as a top-up charge will complete faster. Check the battery contacts for dirt or corrosion, hindering efficient energy transfer. A low input voltage from the power outlet can also contribute to slower charging.
Finally, older or heavily used batteries may exhibit reduced charging acceptance, extending the charging duration. Consider replacing batteries showing consistently slow charging behavior.
Maintaining Your Energizer Charger
To ensure the longevity and optimal performance of your Energizer NiMH charger, regular maintenance is key; Periodically inspect the battery contacts for any signs of corrosion or debris. Gently clean them with a dry cloth or cotton swab to maintain a solid connection. Avoid exposing the charger to extreme temperatures or humidity, as this can damage internal components.
Always unplug the charger when not in use, and store it in a clean, dry location. Do not disassemble the charger, as this will void the warranty and could pose a safety hazard. Regularly check the power cord for any damage, such as fraying or exposed wires.
Proper storage and careful handling will help your Energizer charger continue to reliably power your NiMH batteries for years to come.
Battery Care Tips for Optimal Performance
Maximizing the lifespan and performance of your Energizer NiMH batteries requires proper care. Avoid completely discharging batteries before recharging, as this can reduce their overall capacity. It’s best to charge them when they are partially depleted. Store batteries in a cool, dry place, away from direct sunlight and extreme temperatures.
When storing for extended periods, charge them to approximately 40-50% capacity. Avoid mixing old and new batteries, or batteries with different charge levels, within the same device. Always use a compatible NiMH charger, like the Energizer models, to prevent overcharging or damage.
Proper battery care ensures consistent power and extends the usability of your rechargeable batteries, saving you money and reducing waste.
Technical Specifications (Dimensions, Input Voltage)
The Energizer 1-Hour Charger, Model CHVCM4E/CHVCM4, boasts compact dimensions of 75 x 32 x 115mm, making it ideal for travel and home use. Its sleek black finish complements any setting. This charger is designed for standard input voltage, operating efficiently within a range suitable for most regions – specific voltage details are typically printed on the charger’s base.
The charger accommodates 2 or 4 AA or AAA NiMH rechargeable batteries simultaneously. It’s important to note that the charging time of 60 minutes (for AA batteries) is achieved with compatible Energizer NiMH batteries and may vary based on battery capacity and condition.
Always refer to the product packaging or the charger itself for the most accurate and up-to-date technical specifications.
Warranty Information & Support
Energizer stands behind the quality of its NiMH chargers. While contents do not constitute a warranty, most Energizer chargers are covered by a limited warranty against defects in materials and workmanship. The warranty period varies by region and product model; please retain your proof of purchase for warranty claims.
For detailed warranty information, including terms and conditions, visit the official Energizer website or consult the documentation included with your charger (CHVCM4E/CHVCM4).
Should you encounter any issues or require assistance, Energizer offers comprehensive customer support. You can find helpful FAQs, troubleshooting guides, and contact information on their website. Direct support channels, such as phone and email, are also available to address your specific concerns and ensure a positive charging experience.