When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
if Not storing where warm place (assume gets very cold there), I suggest either the trickle charger or removing battery to a warm place. If it goes dead in COLD place it could freeze & bust open making huge mess. These are things that are not issues in southern places that us Hibernators have to be aware of.
Check and see if the storage compartment light behind the seats is staying on with the door closed. I had a bad switch that was causing the battery to drain down over time.
I doubt this is your issue, OP, but a good reminder for all forum members who's cars may sit a period between being driven much : It doesn't hurt to every once in a while rock the battery back and fourth many times (vigorously) to mix the electrolyte, esp before charging, or periodically if it's sitting with a maintainer charger. This will help reduce stratification of the electrolyte and water, and add life to your battery. For this reason I don't bolt down the lead-acid batteries on cars I seldom drive. Makes it easier to rock back/fourth (vigorously). Note: AGM batteries shouldn't stratify like this.
Also a heavily stratified L/A battery can mimic a weak battery. Just a reminder....
To measure parasitic battery drain you need to connect a digital multimeter to the negative battery terminal and measure amps.
...and start pulling fuses, and/or connectors.
Besides shorted wires, aftermarket USB stations, Bluetooth devices, Radios, etc, can be a source of high drain, as can any aftermarket device. Don't overlook the possibility of shorted (broken) wires in your door if you have power windows. Brittle wires can break after a thousand door openings/closings.
