How to Keep AA Batteries Fresh

AA batteries are use in many portable electronic devices. While all batteries will lose their charge over time, they can lose their charge much faster if not handled properly. Even rechargeable batteries can be found to lose their charge if not properly cared for. If you want to get the most out of your AA batteries, be they rechargeable or not, there are some steps you can take to keeping them fresh and preserving their charge rate.

Difficulty: Easy

Instructions

1. Avoid keeping batteries in any devices that won't be used in a long time. Batteries will self-discharge over time on their own, but the discharge rate can increase when left in a devices. Store the batteries or use them in other devices instead of letting them run out in things you're not using.

2. Store the batteries in a temperate, dry container. If you get a battery case to store them, get at least two--one for your brand-new, unused batteries and another for batteries that have been used and removed or recharged.

3. Keep batteries together that have been used together. Never insert an old/recharged battery in the same device with a new one. This will force the older battery to work harder and possibly damage it and the device.

4. Remove rechargeable batteries from the charger as soon as they are finished charging. Leaving charged batteries in there exposes them to a constant charge that will actually reduce their charge rate.

5. Use the same rechargeable batteries in the same device they were in before after charging them. This way, you'll always be using batteries that have the same charge rate, so they will discharge evenly.

6. Get nickel-hydride (NiMH) batteries, such as Sanyo Eneloops, that are made with a modified chemistry. These batteries are specially designed to be stored after charging for months with little self-discharge.

Tips & Warnings

• An "intelligent" battery charger can read each battery individually and recharge it to its optimum charge. Because one costs around $100, however, it's useful only for people who use several batteries frequently.

References

• Battery Forums
• Digital Photography Review