Large Rechargeable Battery Kit

We put all the brands to the test, using a pair of identical Mini-Mag AA flashlights, and found our Gaiam Real Goods NiMH rechargeables outlasted the top alkaline battery by almost 30 minutes. Despite the TV ads touting advanced technology, alkaline batteries have not gotten significantly better. But rechargeable NiMH batteries, which have always excelled in terms of environmental impact, have pulled ahead when it comes to performance as well as economic return.