The O-125v2 has Duo technology and is for 12V / 12.8V batteries. Weatherproof sealing cap when the vehicle is moving!
Tecmate OptiMATE MONITOR Black Battery Tester O127 3807-0319 Lithium
TecMate OptiMate Battery Monitor Lead 12V w/Integrated Battery Status O124
Tecmate Optimate 3, 12V 0.6A Battery Saving Charger & Tester
Tecmate Optimate 3, , 7-Step 12V 0.8A Sealed Battery Saving Charger &
