That gives me 3 sources saying essentially the same thing, so good. They are both 900mah and same brand. I messed up one ego board and someone else messed up another so I guess the only wild card is, I don't know how heavily used the other one was over the two weeks before I got a hold of it and hooked them to a third board. I don't think me using one 3 weeks and the other person using the other batt for 2 weeks would have worn down from the manufactured mah by a too much.