This 194-gram battery generates run times comparable to Light & Motion's NiMH battery, but the Li-Ion weighs less than half as much. Its lightweight makes it the perfect upgrade for 24 Hour racers. Buy it as a spare or use it as an upgrade. The Li-Ion battery is cross-compatible with all ARC, Solo Logic (MV), and Stella LED light heads. Includes mounting strap. Charger not included.