Best rechargeable batteries for you

Battery experts recommend rechargeable Nickel-Metal Hydride (NiMH) batteries for most purposes. Since they can be recharged at least 500 times before needing to be recycled, they’re better for the environment and are more cost-effective. The problem has been that NiMH rechargeable batteries don’t hold their charge very long in storage - they lose about one percent of their stored energy every day. One percent a day doesn’t sound like much, but it’s like compounding money in the wrong direction. After a month, capacity drops to about 73 percent; by three months it’s only 40 percent, by six months 14 percent. Keeping them charged can get tedious, and owners complain that it’s inconvenient to have to recharge NiMH batteries right before using them.

Two competing solutions emerged to solve this problem, but only one has survived. Rayovac has discontinued its popular IC3 batteries(*Est. $10 for four AAs) that recharged in just 15 minutes in favor of hybrid rechargeable batteries that keep their charge much longer. However, comparison tests show that two other brands of hybrid batteries perform better. Sanyo eneloop(*Est. $10 per four-pack, AA) leads the pack, with UniRoss Hybrio(*Est. $15 for four AAs) close behind. They both can be recharged up to 1,000 times.

Also called “low self-discharge rechargeable batteries,” these dell xps m140 battery,dell xps m1210 battery combine the benefits of rechargeable batteries with those of alkaline batteries - hence the popular term “hybrid batteries.” They self-discharge at such a slow rate that after a year, they still have about 85 percent of their capacity. They’re also called “pre-charged” batteries, because they’re charged up to that capacity right at the factory. That means you can use them right out of the package, or store them for future use.

Unlike the Rayovac IC3 15-minute batteries, hybrid batteries can be recharged in any good-quality battery charger. (Experts say it’s well worth buying a good “smart” charger to protect your investment in rechargeable batteries.) Sanyo eneloop batteries come in AA and AAA sizes, but you can also get adapters to use them in devices that use C or D batteries. The Sanyo eneloop Power Pack (*Est. $35) includes a charger, eight AA batteries, four AAA batteries and two each of the C and D adapters. All these components are also available individually. Tests find that these eneloop batteries actually do last much longer than older rechargeable batteries, and we found numerous blog entries dedicated solely to recommending these batteries.

USB dell latitude d830 battery,dell latitude x300 battery chargers are also popular with frequent computer users, and with travelers who don’t want to take separate chargers for all their electronic devices. By recharging AA and AAA batteries via a USB port on a laptop computer, only the laptop’s cord is needed. Sanyo makes a USB charger kit (*est. $15) that comes with two AA eneloop batteries. This is so popular that it’s gotten rave reviews from over 350 owners at Amazon.com.

There’s been some buzz about regular NiMH batteries that have a USB connector built right into their cap. USBCell batteries (*Est. $20 for two AAs) don’t hold their charge a long time the way Sanyo eneloop or UniRoss Hybrio hybrid batteries do, yet they cost more. However, you don’t need an extra charger, so if you only need two AA dell latitude d810 battery,dell latitude d820 battery and have USB ports free on your computer, they can be a good buy.