3.70V,2200mAh,Li-ion, Replacement Pocket PC Battery for Dell Axim X50, Axim X50v, Axim X51, Axim X51v, This PDA battery replace part numbers: 310-5964, 310-5965, 35h00056-00, 36485, 451-10200, 451-10201, EHDE005SO1, HC03U, T6476, T6845, U6191, U6192 High capacity 2200mAh Li-ion Pocket PC Battery for Dell Axim X50, X50v, X51, X51v