So disconnecting the battery discharges the battery. There are other boards that only consume significantly less, but require a housing for them.
Charger Vympel 57 black
110 Review
CARKU Pro-10 black/red
91 Review
Keep Your Battery Fully Charged With A Smart 12V Charger/Maintainer Featuring Winter Mode
28 Review
Case Compatible With Halo Bolt Portable Car Battery Jump Starter 58830/44400/57720 MWh Charger. Power Bank Holder For Halo Power Station 100/For AC Outlet.(Not Fits For Halo Bolt Air, Box Only)
24 Review