Extended life lithium batterythe new extended capacity lithium battery can be used with x series trolleys of all agesthe battery is designed to be used on longer more hilly type courses and offers a 30 increase on the standard lithium batterythe new lithium phosphate 30ah battery has been developed as a true 12v battery which means that it can be used in any x series x1 x3 x5 x7 or x9 there are no electronics changes or adjustments necessary you can just start using the new