this is a repost of my AA powered equipment, but you may get some ideas... the AC to USB charger (right side) works pretty well with the Guide 10 pack of Sanyo Eneloop 1600mAh cells.. it is 850mA and a 1A is available...the Guide 10 pack charges with a USBmini in from any source and is regular USB out



this is the rest of the AA charging options... the SCH 808F controller charger is 12vdc and 120vac... I use the 12v female battery tap to power my digital portable TV and 12v fans if necessary...