Home » Car Batteries » Im Charging My Car With A Battery Charger Im Charging My Car With A Battery Charger Im charging my car with a battery charger… my question is should i start the car before or after i disconnect the cables??? Tags:Battery, Charger, Charging Related Questions High Performance Alternator Will putting a high performance alternator help keep my lights from dimming when my bass hits? i have two 600 watt rms amps and four 12s in a 2002 Is It Beneficial To Charge A New Car Battery Before Installing It In A Car Let’s assume the person buying it does mostly short trips, so it might be awhile before a long highway drive happens in which the alternator would charge the battery Answers for The Question psychopiet doesn’t matter. Angel Lee I believe before. ??Mrs. Rose?? Either way. It doesn’t matter. Just make sure it’s charged long enough to start it or else it will drain the battery more and you will have to wait longer. sporty_blue321 I usually do it after everythingspeachy2000 You can try it before…then when started disconnect it. Let it run a bit before shutting it off again though…let the battery charge up with running the engine. pedro7of9 disconeck first…and you r charging the battery not the car…[sorry couldent help myself] BuH-LeEN-DuH.! after it is done chargn, plz mr.sanders Depends on the charger. If the charger has a boost option and will put out more than 60 amps, then use that setting to try and crank the car over. If it’s a slow charger. (2amp-40amp) then it’s better to disconnect it. A slow charger may burn up if you leave it connected while starting. Jeremy S How big is the charger? If it is a small unit, say 12″x12″x6″. This will take at least an hour to charge, follow the directions as prescribed by manufacturer. In any case, car can be started before or after disconnecting cables. I like to start while connected. Good luck! Devin It won’t hurt anything I just did 5 minutes ago doesnt do anything at all [email protected] Depending on the type of charger and if you can leave on overnight it really doesn’t matter. However, starting a car is the single biggest drain on a car’s battery so leave the charger on as long as possible and plan to drive your car upon starting. An idling engine does very little to charge a car’s battery. Incoming search terms: Should You Unplug Battery Charger Before Starting Car,Can Battery Charger Be Running When Starting Car,Do I Unplug Battery Charger Before Starting Car?