I buy and sell.. few weeks ago I got burned on some laptop batteries. bought 3 BN OEM IBM 600 series batteries for the price of 1 aftermarket.. when they got to my house, 2 of the batteries were new, had warranty tags and last over 1hr per charge. there were actully 4 batteries in the box even tho I bought 3... the other 2 batteries were dead flat, obviously used and took no charge. contacted seller and he said he would refund if I sent all of them back at my expense.. no partial refund for the 2 dead batteries.. and I checked the batteries on 2 diffrent 600 series laptops.. but it was still a good deal so I'll dispose of the junk batteries.