Getting started
Disposable batteries have become a staple in our world of high-tech portable electronic devices. AA batteries are still the most widely sold battery type, used in many toys, radios, flashlights, and remote controls, and in some digital cameras, though more of those are using tiny rechargeables. But do you really need to buy expensive brand-name batteries to keep your gadgets up and running?
We tested nonrechargeable lithium, nickel oxhydroxide, and alkaline battery types. Our technicians found real differences among well-known names and value brands.
How we tested
To measure how long AA batteries lasted, testers loaded them into identical digital cameras. They zoomed 3 times, took 5 photos with the flash, zoomed 3 more times, and then took 5 photos without the flash. After a 10 minute rest, the test was repeated again and again until the batteries died.
The longest-lasting battery took 1,286 photos before dying; the quickest to die took just 133.
Take manufacturer claims with a grain of salt. Duracell Ultra PowerPix, for example, lasted for 174 shots, which is indeed "up to 200 photos," as claimed--but any number under 200 meets that boast.
Rechargeable batteries
Rechargeable batteries are a greener choice than any of the tested types. In past tests, precharged rechargeables from the major manufacturers provided about 300 shots out of the box and about 400 shots on their subsequent charge.
If your town doesn't provide a way to recycle nonrechargeable batteries, it's OK to toss them in the trash. To find out where to recycle rechargeables, go to www.call2recycle.org.
Bottom line
Lithium batteries took more photos than the other types, so they don't need to be changed as often. Use lithiums in high-drain devices such as cameras and alkalines in low-drain devices such as remote controls. For toys that are used a lot, consider high-capacity rechargeables (2,350 milliamp-hours or more).
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