Duracell AAA Rechargeable Batteries 900mAh NiMH - 4 Pack

The Duracell AAA rechargeable batteries are 900mAh NiMH cells supplied in a 4-pack, pre-charged and ready to use straight from the package. Each battery can be recharged hundreds of times using any standard NiMH battery charger, reducing ongoing battery costs and waste compared to single-use alkaline cells.

Designed for devices with moderate to high power draw, the 900mAh capacity suits wireless game controllers, baby monitors, remote controls, cordless phones, digital cameras and portable radios. The batteries retain charge for up to 12 months when stored unused, so spares can be kept ready without needing to top them up before each use. The pre-charge means devices can be powered immediately without waiting for an initial charge cycle.

The NiMH chemistry delivers 1.2V nominal voltage per cell, slightly lower than the 1.5V of alkaline batteries but compatible with the same devices. Unused batteries carry a 5-year shelf life guarantee from Duracell, and the cells maintain capacity through repeated charge cycles without the memory effect that affected older NiCd rechargeable technology. The 4-pack format provides a pair for a device plus a charged spare pair ready to swap in.

How many times can these batteries be recharged?

Duracell states these NiMH cells can be recharged hundreds of times. The exact number depends on usage patterns and charger quality, but typical NiMH AAA batteries of this type sustain 500-1000 charge cycles before capacity drops noticeably.

Do they come charged or do I need to charge them first?

The batteries come pre-charged from Duracell and are ready to use immediately. You can insert them into a device straight from the pack without an initial charge cycle.

What charger do I need?

Any standard NiMH battery charger will work. Avoid using chargers designed only for NiCd batteries, as they may overcharge NiMH cells. Look for chargers marked as compatible with NiMH or universal rechargeable battery chargers.

How long do they hold charge when not in use?

Duracell states these batteries retain charge for up to 12 months when stored unused. This makes them suitable for emergency devices or spares kept in a drawer without needing regular maintenance charging.