Energizer

Energizer batteries and portable lights power your devices and help equip an emergency kit. Ultimate Lithium AA and AAA batteries target high-tech devices, while rechargeable batteries suit equipment you use repeatedly and can recharge between jobs. Choose by the device’s battery requirements and how you plan to use it.

Energizer is the battery and portable-lighting brand of Energizer Holdings, Inc., based in Clayton, Missouri. Its roots are in the Eveready Battery Company. Ralston spun off the business as Energizer Holdings in 2000.

Batteries for high-tech devices and repeated use

Ultimate Lithium AA and AAA batteries are intended for high-tech devices. Start with the device’s required size and chemistry. That’s the useful match.

For repeated use, Energizer’s rechargeable batteries include nickel-metal-hydride chemistry. Energizer describes charging an alkaline battery as abusive. Choose cells explicitly marked rechargeable and a charger matched to their chemistry.

Runtime depends on the equipment and how you run it. When comparing batteries in your device, keep the settings and pattern of use the same.

Check the contacts and battery direction

Energizer MAX C and D batteries are alkaline, and their reversal-protection design can fail to connect with some flat device contacts, so check the contact shape before choosing them.

Energizer explains that a device can run while the other batteries charge an alkaline battery installed backward. Check every battery against the compartment’s polarity marks.

Coin batteries and emergency lights

Energizer makes coin lithium batteries with secure packaging, a bitter coating and Color Alert technology that turns the mouth blue after contact with saliva to signal possible ingestion. For a replacement, match the battery designation required by the device. Keep batteries out of children’s reach.

For an emergency kit, Energizer Weather Ready includes area lights and flashlights that accept multiple battery sizes; keep the battery sizes specified for your particular light with the kit.

Battery specifications

Battery type	Specification
Ultimate Lithium	AA and AAA sizes; intended for high-tech devices
Energizer rechargeable batteries	Nickel-metal-hydride chemistry

Frequently Asked Questions

Are Energizer batteries rechargeable?

Some are, but the Energizer name alone doesn’t mean you can recharge a battery. Check that your cells are marked rechargeable and that your charger accepts their chemistry. Alkaline batteries aren’t for recharging.

Are Energizer MAX batteries lithium?

Energizer MAX C and D batteries are alkaline, not lithium. For another size, check the chemistry on the package against your device’s requirements.

How long do Energizer AA batteries last in use?

There’s no single runtime for Energizer AA batteries. Your device’s power draw, its settings and how often you run it determine how quickly you use them up. A runtime comparison is useful only when those conditions stay the same.

Are Energizer batteries any good?

Energizer Ultimate Lithium AA and AAA batteries are intended for high-tech devices, so they’re a sensible choice when your device calls for that size and chemistry. The right match matters more than the name on the battery.