If the battery has the vent fitting, I'd use it, but I usually run a long enough tube to make it so it does not drip on anything I care about. It does help keep the battery box area in better shape. If it does not have a fitting, there are special mats you can buy to put under a battery to soak up and neutralize any acid that drips. Dave __________________ Dave - PDX 1995 318ti - Active Black and Tan. 2005 330xi - Mtech 1 - 6spd - Orient Blue/Black |