Prodigy Parasite?

I believe that a properly installed Prodigy controller gets it's power from either the Accessory switched or ignition switched part of the fuse block and thus does not draw power when engine off.

Second. If you let it sit for months on end consider a "Battery Tender" (tm) type product.. They work well.

I remember a note in a Tekonsha manual saying the draw of a controller left connected (and I believe that was connected TO a trailer) was negligible. Different model, different time, but I think that if your battery is discharging, it is for some different reason than brake controller.

DownTheAvenue wrote:
The best strategy for the health of the battery and the vehicle mechanicals is to drive the vehicle every few weeks..

The best strategy probably is a combination of the two: Use a battery tender and "flag" it by leaving the hood open....or similar....AND actually run it for 20 minutes every 6 weeks or so and move it 6 inches to a foot to prevent a flat spot on the tires.

Also a periodic inspection of the engine compartment looking for rodent infestation is really important in some areas.

If there is any parasitic loss, it is very very tiny. No worse than anything else on the vehicle.

My advice to you is, get the battery maintainer and deal with the contrived "problem" of backing out of the garage with it still plugged in. You check the engine oil before you start it after sitting a while, right? If you don't trip over the cord doing that, you're doing something wrong. Tie a big yellow ribbon on it or something. Figure out a way to remember.

The benefits far outweigh the slight inconvenience of forgetting to unplug the charger one time. You'll only forget once and even if you forget the worst that will happen is you pull the plug out of the extension cord.

Your vehicle most certainly has parasitic draws other than the brake controller. The radio, remote door locks, and many on board computers are just a few examples. The best strategy for the health of the battery and the vehicle mechanicals is to drive the vehicle every few weeks..