Bought a few months ago just had to use now, lost instuctions. I thought the sales guy said 15 min to recharge the batteries. Well that did not work niether did 3 hours(hope I have not fried something!) There is space for four batteries and when you plug into the wall light goes green. Also can you recharge lithium batteries, I thought he said you could. Hopefully I have done something really brainless cause it does seem quite staight forward Help (: