Duracell AAA HR03 Rechargeable Batteries 750mAh NiMH - 4 Pack

The Duracell AAA HR03 is a rechargeable battery with 750mAh capacity using nickel-metal hydride (NiMH) chemistry, supplied in a pack of four cells. Each battery delivers 1.2V nominal voltage and can be recharged up to 100 times before capacity begins to degrade, replacing the need for single-use alkaline AAA cells in moderate-drain devices.

Designed for remote controls, wireless keyboards, computer mice, digital cameras, portable radios and clocks, the 750mAh capacity suits devices that draw power intermittently rather than continuously. The batteries arrive pre-charged and hold their charge for up to 12 months in storage when unused, meaning they can be fitted straight from the pack without waiting for an initial charge cycle. Standard AAA dimensions (10.5mm diameter, 44.5mm length) ensure compatibility with any device that accepts AAA cells.

NiMH cells like these perform better in cold conditions than standard alkaline batteries and maintain consistent voltage output as they discharge, which prevents the gradual dimming or slowing that alkaline cells show as they approach depletion. The four-pack size suits households and offices keeping a drawer of rechargeable spares for everyday electronics. Duracell recommends charging these with a smart NiMH charger that detects full charge and switches to trickle mode, which extends the usable lifespan of the cells.

How many times can these be recharged?

Duracell rates these cells for up to 100 charge cycles before capacity starts to degrade. Actual cycle life depends on the charger used and how deeply the battery is discharged before recharging. Charging before full depletion can extend lifespan.

Do they come charged and ready to use?

Yes. The batteries are pre-charged at the factory and can be used immediately. They hold charge for up to 12 months in storage, though a top-up charge is recommended if they have been stored for more than six months.

What charger should I use?

Use a smart NiMH charger that detects full charge and switches to maintenance mode. Avoid basic timer-based chargers, which can overcharge NiMH cells and reduce their lifespan. Duracell produces compatible chargers, as do brands like Ansmann and Varta.

Can they replace alkaline AAA batteries in all devices?

They fit any device that takes AAA cells, but NiMH rechargeable batteries deliver 1.2V compared to alkaline's 1.5V. Most modern electronics tolerate this difference, but some older devices designed strictly for 1.5V cells may show reduced performance or refuse to operate.