These Varley Red Top 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 DMS 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 femaleImportant note: Varley Red Top Lithium RT900 battery is suitable for engines up to 2000cc and must only be charged using a DMS lithium battery charger. The use of other chargers will invalidate the warranty.