How do you know how full your batteries are? With AGM or flooded batteries, you can get a rough idea using a “state of charge” graph and your system’s current voltage.. but, sometimes you want more details. What if you want an exact percentage, want to know exactly how much current is flowing in/out of your batteries at any given time, or have Lithium batteries that don’t have enough voltage drop to determine state of charge by voltage alone?...

The Ford Transit factory 4″ reverse camera in my otherwise-pointless rear view mirror leaves a lot to be desired for me. My Pioneer head unit, installation details here, has both front and rear camera inputs. The reverse camera has a trigger wire that automatically pulls it up on the screen when it is sent 12v power (the intention being that this is wired into a circuit powered up when the vehicle is in reverse)....

I’ve been using this magnetic 4G antenna with my weBoost 4G-M cellular booster for about a year now. The performance was good, or so I thought. The magnetic bit was strong enough to hold on at interstate speeds without issue, but every single tree branch that I encountered would leave it dangling down, or stuck to my back door....

Having a Yukon Gear locker installed, I wanted to be able to change the gear oil in my differential regularly.. and the factory cover makes that a nightmare. Sealed with only black RTV from the factory, draining the oil involves removing twelve bolts, breaking that RTV seal, cleaning both surfaces, reapplying RTV, reinstalling twelve bolts, allowing time to cure, and filling with oil....