Home / Power and batteries

Energizer rechargeable batteries: which line and charger to buy

By the Plain Prepper editors. Updated 2026-10-17.

We research products from makers' specs, manuals and safety agencies; we do not run hands-on tests. Links to Amazon may earn us a commission at no cost to you. How this works.

Quick answer

Energizer sells two main NiMH lines. Recharge Universal AA cells are rated 2,000 mAh, come pre-charged and can be charged up to 1,000 cycles, Energizer says. Power Plus AA cells hold more, 2,300 mAh, but Energizer only says they can be charged hundreds of times. For an outage kit, Universal is the better fit for long storage; Power Plus suits gear you drain and recharge often. Energizer's Recharge Universal Charger also takes C, D and 9V cells.

Energizer rechargeable lineup at a glance

Battery	Rated capacity	Energizer's charge claims
Recharge Universal AA	2,000 mAh	Up to 1,000 cycles; pre-charged; up to 12 years total usable life
Power Plus AA	2,300 mAh	Hundreds of times; up to 5 year battery life
Recharge Universal AAA	700 mAh	Up to 1,000 times; holds charge up to 1 year in storage
Power Plus AAA	800 mAh	Hundreds of times
Recharge Universal C, D and 9V	Varies by size	Hundreds of times; charge can last up to 12 months in storage

AA and Universal AAA capacities are from the NH15-2000, NH15-2300 and NH12-700 datasheets linked on Energizer's product pages; the Power Plus AAA figure and all charge claims are from Energizer's Recharge lineup page, checked October 2026. All are 1.2 volt NiMH cells.

Universal or Power Plus?

• Recharge Universal: the longer life line. Energizer says the AA can be charged up to 1,000 cycles, comes pre-charged and offers up to 12 years of total usable life under typical usage. It says the Universal AAA gives more charges than Power Plus and holds its charge for up to 1 year in storage.
• Power Plus: the higher capacity line. The AA is rated 2,300 mAh against 2,000 for Universal, and the AAA 800 mAh against 700. Energizer says Power Plus AA cells offer up to a 5 year battery life, are made with 22% recycled materials and are designed to prevent leaks.
• Simple rule: pick Universal for flashlights and radios that wait in a kit, and Power Plus for cameras, game controllers and other gear you run down every week.

Rechargeable vs alkaline for emergencies

Energizer's own NiMH handbook lays out the tradeoff. It lists NiMH as retaining 50 to 80% of its charge at 12 months, against 80% at 10 years for alkaline. It says modern AA NiMH cells provide about 75% of alkaline capacity at low drain rates but can beat alkaline in high drain devices, and that NiMH can be recharged hundreds of times. The 2018 handbook put NiMH battery life at 5 years or less; Energizer's current Universal AA page claims up to 12 years of total usable life under typical usage.

The practical plan: keep a charged rechargeable set for daily and outage use, plus sealed alkaline cells in the kit as a backup. Ready.gov advises planning for batteries and other power sources and having flashlights for every household member. See our D cell battery guide for lantern sizes and our rechargeable AA guide for low self discharge eneloop cells.

Chargers: check the sizes listed

A charger only helps if it fits your cells, so read the listed sizes before you buy. The Energizer Recharge Universal Charger lists the widest range: up to 4 AA, AAA, C or D cells, or 2 9V NiMH batteries at once. Energizer says it has auto shut-off, an easy to read LCD that shows the charging status of each battery, and approximate charge times of 2 to 6 hours, with 4 AA cells taking 3 hours.

That makes it the simplest choice for a household that runs D cell lanterns, 9V devices and AA flashlights. If you only use AA and AAA, any charger that lists those sizes and NiMH chemistry will do, but keep the charger and a power source in your outage plan, such as a portable power station or a generator run outdoors.

Charging and storage tips from the datasheets

• Charge indoors: Energizer's AA NiMH datasheets list a charging range of 32°F to 104°F (0°C to 40°C) and a discharge range up to 122°F (50°C).
• Store cool: they list storage from -4°F to 86°F (-20°C to 30°C) and note that operating at extreme temperatures significantly impacts cycle life.
• Top up stored sets: since NiMH loses charge over months, put a reminder on your calendar to recharge kit batteries.
• Match the charger: Energizer's alkaline handbook says not to use rechargeable batteries in chargers not designed for that battery type, and never to recharge a battery unless it is marked rechargeable.
• Do not mix: the same handbook warns against mixing old and new batteries or different types or makes in one device.

What to look for when you buy

Questions people ask

What is the difference between Energizer Recharge Universal and Power Plus?

Universal is rated for more charge cycles and longer usable life; Power Plus holds more charge per cycle, 2,300 versus 2,000 mAh for AA.

How many times can Energizer rechargeable batteries be charged?

Energizer says Recharge Universal AA and AAA can be charged up to 1,000 times; Power Plus and the C, D and 9V cells hundreds of times.

Do Energizer rechargeable batteries come charged?

Energizer says Recharge Universal AA and AAA batteries come pre-charged.

Which Energizer charger takes D batteries?

The Recharge Universal Charger lists AA, AAA, C, D and 9V NiMH batteries.

Are Energizer rechargeables good for power outages?

Yes for gear you use often, if you keep them charged. Energizer's handbook shows NiMH loses more charge in storage than alkaline, so keep sealed alkaline backups.

Sources

• Energizer Recharge (energizer.com), Energizer
• Energizer NH15-2000 (HR6) AA datasheet (energizer.com), Energizer
• Energizer NH15-2300 (HR6) AA datasheet (energizer.com), Energizer
• Energizer NH12-700 (HR03) AAA datasheet (energizer.com), Energizer
• Nickel Metal Hydride (NiMH) Handbook and Application Manual (data.energizer.com), Energizer
• Alkaline Manganese Dioxide Handbook and Application Manual (data.energizer.com), Energizer
• Energizer Recharge Universal Charger (energizer.com), Energizer
• Power Outages, Ready.gov (maker page: www.ready.gov/power-outages)

Sources checked 2026-10-17.