To prevent the possibility of a dead battery, Porsche AG recommends the battery be kept in a fully charged state using the factory approved battery maintainer .
Porsche CTEK MUS 4.3 Battery Charger Tender Conditioner & Adapter 911 & others. . For Porsche 911 Carrera Boxster Cayenne Battery Maintainer Trickle .
Porsche Battery Maintainer Trickle Charger 911 Carrera Cayman Boxster Cayenne. Purchased this trickle charger to protect the battery in my 2008 Cayenne, .
Just hooked up my battery tender and the red light stays on which suggest there is a draw on the battery somewhere.I am wondering if the front .