This is the Traxxas SERIES 5 5000mAh 8.4V 7C 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: 160mm (6.3″)
• Width: 49mm (1.9″)
• Height: 25mm (0.98″)
• Charge Rate: 3A

Compatibility

• 4-Tec 3.0
• 4-Tec Original
• Drag Slash
• E-Maxx
• E-Revo
• Hoss
• Rally
• Rustler 2wd
• Slash 2wd
• Slash 4×4 Ultimate
• Spartan
• Stampede 2wd
• Summit 1/10
• TRX-4