About – Replacement high capacity battery packs for Easyprox Compact, Easyprox Compact keypad and Easyprox nano. We recommend for use with Easyprox nano and for sites with busy access points or a particularly high number of users. Installation – Remove the unit from the door. Remove the access plate to reveal the battery pack. Replace the battery pack and refit the access plate. Operation – The unit will continue to operate as usual.