NiMH Rechargeable Battery Pack, 2.2 Ah, 12V - LITEGEAR INC.
Amazon.com: Tenergy NiMH Battery Pack 12V 2000mAh High Capacity Rechargeable Battery w/Bare Leads Replacement Battery Pack for DIY, Medical Equipments, LED Light Kit, RC Models, Portable 12V DC Devices and More :
XR10 4500: Race pack, NiMh, 4.5 Ah, 12 Volt - 10 cells at reichelt elektronik
TETRIX® MAX 12-Volt Rechargeable 3,000 mAh NiMH Battery Pack (W39057)
Nickel–metal hydride battery - Wikipedia
TETRIX® MAX 12-Volt Rechargeable 3,000 mAh NiMH Battery Pack (W39057)