This is the Traxxas SERIES 5 5000mAh 8.4V 7C Hump 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
• LiPo charging bag

Specs:

• Type: Nickel Metal Hydride – NiMH
• Capacity: 5000mAh minimum
• Voltage: 8.4V
• Connector Type: Traxxas High Current
• Wire Gauge: 12
• Number of Cells: 7
• Configuration: Hump