Battery-Biz Hi-Capacity B-5054 - Notebook battery - 1 x lithium ion 6-cell 5200 mAh - white - for Compaq Presario B2820, B2821, B2822, B2825, B2826, B2827, B2828, B2829, B2830, B2831
InfoLithium L - slim battery. Rectangular battery with two contacts on end
Battery-Biz B-5051 - Notebook battery - 1 x lithium ion 6-cell 4600 mAh - black - for HP EliteBook 8530p, 8530w
Rectangular battery with five slit-type contacts on protruding hump.
Hard plastic casing. 6 contacts on end, fuel gauge on other end.