These Varley RT900 Lithium batteries offer a weight saving of 70% over a Varley Red Top 30 with a much higher cranking current. Weighing just 2.5kg the RT900 lithium battery is ideal for reducing the weight of your race car without compromise. The battery can be recharged quickly using a suitable lithium battery charger and is tested to UN regulations for transportation.Huge weight saving compared to a lead acid or gel batteryCompact dimensions increase options for mounting positionsHigh cranking power suitable for large capacity or high compression enginesNominal Voltage: 12.8VTerminals: M6 femaleVarley Lithium batteries are Motorsport UK (MSA) approved for Motorsport use.