No insulator. When a battery in the system reaches 13.3 volts, it completes the circuit. This means that attempting to charge the vehicle will drain your auxiliary battery when it is fully charged.
Xiaomi 70mai Jump Starter Midrive PS01
120 Review
Charger Vympel 57 black
110 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
Efficient Charging With LST 7 Stages 5A Battery Charger - 3.3A 12V For Ultimate Performance
35 Review