From Muchmore Racing:
Muchmore Racing’s New Li-Fe Hump RX Battery Pack.
IMPACT FD RX hump type battery is perfect for use as a receiver battery for nitro-powered cars, buggies, and trucks that require a stick configuration.
The standard power plug fits directly into your receiver/switch harness while a JST-XH balance connector allows for simple balance charging.
Voltage Input: 6.6V
Size: 56 x 30 x 32 mm
Weight: 88.5g (Including wire and connector):
Connector: JR Style with thick 20AWG Silicone Wire / 80mm: Balancer Plug: XH Type / 35mm