Berkeman, I figure that you'll be the first one in on this. I would have just PM'd you about it, but my box is full and the topic might be of interest to others. With the number of things around our place that run on AA or AAA batteries, from my toy helicopter to W's... toothbrush :uhh:... I just shelled out about a hundred bucks for a bunch of rechargeable NiMH cells in those sizes. When reading the package for the charger, it said that recharging times would be dependent upon the type and brand of battery. Once I got home and opened the package, the instructions inside say that I can use only Duracell batteries in the charger. That seems contradictory to the package. Since there were no Duracell rechargeables for sale other than the 4 in the charger pack, I bought Energizers to go with it. Is there any reason, other than trying to sell more Duracells, that I shouldn't use them? Available specs are: Charger: Duracell model CEF21/1.6 VDC 400 mA for each of 4 AA slots/1.6 VDC 175 mA for each of 4 AAA slots/5 VDC 500 mA on the USB port Duracell Batteries: AA/HR6/DC1500 NiMH/1,2V/1700mAh Energizer AA's: 2000 mAh Energizer AAA's: 900 mAh Those are the only figures that I could find, and are directly quoted from the printing (including the comma rather than period in the '1,2V' spec). Is it safe to use the Energizers with the Duracell charger? And, by the way, what the hell is that 5V USB port for?