From Muchmore Racing:
AVAILABE WITHOUT POWER WIRES
Tire warmers can be built into the battery(Li-Po 3S), so they can be used without connecting to a power supply.
Built-in Li-Po dedicated charging port allows charging without detaching the battery (including dedicated charging cable).
The battery protection function has a low voltage alarm setting function.
Connect to power and balance cable.
Put it like a picture.
Size: 140.0 x 44.0 x 17.5mm