I have 2 handheld Garmin GPS's that use AA batteries and I have some regular Rayovac NiMH rechargeables in them now. However the charge runs down pretty quickly even when not being used which I found out is normal. I have read about Sanyo Eneloop rechargeable that will hold their charge for much longer but have not been able to find any around here. Saw these http://www.rayovac.com/recharge/hybrid_technology.shtml and was wondering if anyone was using them? Sounds like the same technology. Walmart has these.