In preparation for installing a dash cam that will stay recording while the vehicle is parked, I purchased a battery maintainer from Amazon.
The plan is to hard wire the dash-cam to the fuse box in conjunction with a Power Magic Pro
The power magic pro is suppose to shut off the device when the battery reaches the set point. It has decent reviews, we’ll see what happens when I get the dash cam.
The goal of this DIY is to make battery charging/maintaining as easy as possible, I find using the quick connector a little easier and cleaner than using the clamps.
If you want a T50 Torx I used this one from Amazon
Technical skill Cost Time commitment PITA factor
Back to the charging!
I picked up a NOCO Genius G7200
I’m not sure how important the AGM (Absorbed Glass mat) battery charging feature is but I figure it can’t hurt.
The NOCO comes with two connections: Your standard jumper cable style battery clamps and a ring terminal wire. They both have the proprietary NOCO quick connect/disconnect.
Method 1: You DO HAVE a T50 Torx
- Disconnect your positive battery terminal in the trunk, high chance of causing sparks here
- Undo the passengers side rear engine cover
- Insert your T50 Torx and loosen the battery jump stand off connector
- Insert the NOCO provided eye connecter and tighten up, pretty straight forward.
Method 2: If you don’t have a T50 Torx
On the 335i I found a terminal where the positive line could go if you don’t have a T50 Torx. This isn’t a very common Torx to have so here are the details on the other available spot.