HP 2100 Series 6-cell Primary Battery (KU528AA) is compatible with the HP 2133 Mini-Note PC.
Battery (Primary) - 6-cell lithium-ion (Li-Ion), 14.4VDC, 2.55Ah, 55Wh
HP 6700b/6500b Series 6-cell Primary Battery (KU531AA) is compatible with the HP Compaq 6930p, 6735b, 6730b, 6530b and 6535b Notebook PCs.
Battery (Primary) - 8-cell lithium-ion (Li-Ion), 63Wh
HP 6800s/6700s Series 8-cell Primary Battery (KU532AA) is compatible with the HP Compaq 6830s, 6730s and 6735s Notebook PCs.
Battery (Primary) - 8-cell lithium-ion (Li-Ion), 2.55Ah, 73Wh
The HP 8500/8700 Series 8-cell Primary Battery (KU533AA) is compatible with the HP EliteBook 8530p, 8530w, 8730p and 8730w Notebook PCs.
HP 8-Cell 63Wh Li-Ion Primary Battery (NZ375AA) is compatible with the Compaq 610 Business Notebook, HP ProBook 4510s, 4515s, 4710s, and 4720s Notebook PCs.
HP ProBook 6360b, 6460b, and 6560b Notebook PCs
HP EliteBook 8460p and 8560p Notebook PCs and 8460w, 8560w, and 8760w Mobile Workstations
HP EliteBook 8560w and 8760w Mobile Workstations
HP EliteBook 8460p and 8560p Notebook PCs and 8460w Mobile Workstation
