Tecmate Optimate 1 Voltmatic Bronze Series Battery Charger/Maintainer - 6V/12V 600MA - TM-401V2

The best fully automatic battery maintainer
Maintains any type of 6V/ 12V lead-acid battery without overcharging or undercharging
Ideal for vehicles that are in storage or seldom/ seasonally used
Delivers 600mA constant current at 12V
For indoor use (lowest temperature -20┬░C/-4┬░F)
Automatic shutdown if battery disconnects or short circuits