tomb1269

Aged batteries & cold weather, phone chargers left plugged in, any electronics plugged in to 12v ports left for anything more than a few days can cause the battery to drain low enough not to start. Most new cars batteries will not have enough charge to start the engine after 20 to 25 days regardless.


FYI, cars not started for days and exposed to cold temps (usually below 0) may tend to turn the engine over slow and then die. It is the same reason we used to put batteries in the freezer. The cold slow s the chemical reaction in the battery. In this case hit the lights on for a second and then way 30seconds to a minute before starting. The lights will draw on the battery starting up the chemical reaction with out over drawing the available current and allow the chemical reaction to self heat the battery and bring it back to full charge.

Warden888

After nearly 10 months of trying to find my draining battery gremlin (and killing one battery in the process) I finally removed my radio and bought another off ebay ($75). Easy to replace. Viola! Fixed. Been nearly a month now and have no battery draining issues.

I thought about the radio being the problem before and disconnected it, but the battery was so weak and wouldn't take a charge that I thought there were still an issue. New battery and replaced the radio fixed all those issues.

xMUDKINGx

Want to fix all your battery issues ever, install a deep cycle marine battery. I've had one in my 2007 XL for over 5 years with zero issues and I have a 2000w amp, 32" light bar, back up led cubes, HID's, and rock lights. I can listen to music with my truck off for 2+ hours and start it. Left it connected for 9 months while I was deployed and it started first turn. 1300 cold cranking Amps comes in handy too.

casey.mikl

Deep cycle duracells are $100 at SAMs club. Believe they are group 27s? I bought 2 of them for my m35a2 deuce and there great. Bolt style terminals, cheap and 1200 cranking amps a piece. Need one for my truck. As well as the big 3.

drocket12

I had a faulty radio that was draining my battery, replaced it with one off eBay and never had the problem again. With multimeter there are a couple radio fuses and I could never get it down to 0 but radio fuses did drop my reading I had to unplug the radio unit to see it fully drop the meter. I left it unplugged from the back and it didn't die the next day, that's when I went on eBay for another. Removing the radio is a little easier than fuses to start then check the meter plugged and unplugged.