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.
Best bet is to grab a multimeter and probe the fuses. If power shows with cat off, then that’s your battery fuse. If power shows only when car is on, then that’s your ACC fuse!
I’m looking to go with a similar install of battery (BlackVue 124x) in the truck and wanted to see if you were able to get yours tapped into the trunk fuse box.
if you use a hardware kit to tap into your car battery, it can last about 7-10 hours after its threads hold shutoff.
adding another battery really complicate things up, plus you have have upfront cost for the battery, wires to run from front to the trunk, and will you drive long enough to charge the car battery plus the battery pack?