Tenergy 9.6V 5000mAh Inline Hump NiMH Battery Pack w/ Tamiya Connector Compatible with the Invictus 10MT Monster Truck. Advanced NiMH battery technology, no battery memory effect. Easy operation, battery can be charged anytime without the need to fully discharge. Dimensions: 138mm (length) x 47.5mm (width) x 24.5mm (height)