Nearly 10 times the battery capacity when compared to standard 9v battery. Perfect to power the Mychron gauge and all the accessories, i.e. GPS, Lambda, E-box, etc. on karts that don't have an onboard battery. High quality connectors included to attach to the Mychron Power Supply Cable. (Note: Charger not included. Use any low amp trickle charger, i.e. Battery Tender.)