Traxxas SERIES 4 4200mAh 7.2V 6C Flat NiMH with iD Technology.

Features:

• 12AWG multi strand wire is soldered directly to the LiPo cells eliminating increased resistance from bullet connectors and accidental reversed polarity connections
• Semi rigid construction does not require a hard case and eliminates wire harness connectors that can loosen and fail
• iD Technology
• Engineered specifically to fit Traxxas models
• Requires:
• EZ-Peak Plus 4-amp NiMH/LiPo Fast Charger with iD Auto Battery Identification

Specs:

• Length: 139mm (5.5″)
• Width: 49mm (1.9″)
• Height: 25mm (0.98″)
• Charge Rate: 3A