SPEC:

Connector plug:Red JST connector, plug end cross-section size:5.55*3.0mm/0.218*0.13inch.
Plug red cable pin is positive, black cable pin is negative. make sure your device is same line, don't be reversed.
Battery dimensions:
L70*W50*H14.5mm/2.8*1.97*0.57 inch.
Weight:92gram/3.25oz.
Material: Ni-Cad /NICD .
6V 900mAh Nicd rechargeable battery suitable for new version Fisca Blomiky KKNY TEMA1985 Huina 540 1540 6 Channel 2.4G RC dump truck 4 Wheel Driver Mine Construction Alloy Metal Vehicle Truck
6V 900mAh Nicd rechargeable battery suitable for new version Cradream Fisca Blomiky KKNY Huina 520 1520 TopRace 6 Channel Full Functional Front Loader 6 Channel RC Bulldozer.
6V 900mAh Nicd rechargeable battery suitable for new version Fisca Remote Control Excavator RC Digger, 2.4Ghz 11 Channel Construction Vehicle Huina 510 1510 11 Channel RC Excavator Truck.

Package include:
2 x 6V 900mAh AA Battery with JST plug
2 x USB Charger cable