Eneloop AA batteries have always performed reliably for me for the 3 years I've been using them. Last year I discovered
IMEDION brand Ultra Low Discharge 2400 mAh NiMH (made by PowerEX which is made by MAHA - a high quality battery & recharger manufacturer). There's a ton of info about batteries, and about IMEDIONs, at
PSS Enterprises - PaulsFinest.com. I've used IMEDIONs in my K200d for 8 months now and they're wonderful. They claim to retain an 85% charge after sitting in a drawer for a full year! There's an article on that website that states these IMEDIONs are an upgrade to Eneloop.
In my experience they're certainly better than Duracell and any other "Walmart" brand. And for heaven's sake stay away from that garbage from China that's sold on eBAY claiming to be 3,000 mAh. When my package arrived I was surprised that each AA battery weighed less than half that of a Duracell. They wouldn't take a charge and they all went into the garbage. I got suckered good.
Anyway, I'm just a reporter... I do not sell the batteries or am I in any way connected to
PSS Enterprises - PaulsFinest.com except as a paying customer. I have no problem with either Eneloop or PowerEX or IMEDION. Everything else can remain with the retailer.