Check the listing for details. OptiMate 4 Quad Battery Charger. Color: Blue, Condition: New, Made in Germany. Listed at 102.92 USD. The OptiMate 4 Quad program tests before and after charging and can save deeply discharged lead and lithium batteries (LiFePO4) at a voltage of 0.5 volts. No risk of overloading. Completely safe for vehicle electronics (CAN bus compatible). Safe for long term battery maintenance. Automatic shutdown in the event of a short circuit or disconnection of the battery. Fully automatic, multi-stage, the OptiMate 4 Quad program does the rest without the need for supervision! Batteries must not be disposed of by household waste. They are legally obliged to return old batteries so that professional disposal can be guaranteed. You can hand over old batteries at a municipal collection point or on site. We are also obliged to withdraw old batteries as distributors of batteries, whereby our withdrawal ob.