This is the Venom 5000mah 8.4v Stick Pack Nimh Battery - Uni 2.0 Plug [1527-7]

Specifications:

Battery Type: Nickel Metal Hydride (NiMH Battery)

Volts: 8.4

Capacity: 5000mAh

Cell Count: 7S

Cell Configuration: 7-Cell

Charge Rate: 1C (5A)

Wire Gauge: 12 AWG Soft and Flexible Low Resistance Silicone Wire

Plug Type: XT60, Deans, Traxxas legacy, EC3

Dimensions: 155 x 45 x 23.8 mm / 6.1 x 1.77 x 0.94 in

Watt Hours: 42

Weight: 17.7 oz (501 g)