Replace your TomTom Go 540 Live Battery or Keep an Extra Battery on hand as a backup. This kit comes with an Extended Capacity 1100 mAh, Lithium-Polymer Battery that offers up even more up time than your original. Works in your TomTom Go 540 Live unit. Simple, Easy and Inexpensive You get a New Battery, FREE Tools (necessary for installation), Video Instructions AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase NewPower99's TomTom Go 540 Live Battery Replacement Kit. Compatible with TomTom Go 540 and TomTom Go 540 Live GPS units.