AT3021 charger controlled by a microprocessor controller. This charger is suitable for 12V batteries. Electronic overload protection, short circuit or wrong connection (reverse polarity) will save your battery and charging damage and breakages. resuscitation mode (Desulphation) allows you to extend your battery life and restore its capacity that has been lost due to the settling of the salts of sulfuric acid. The charger has completely isolated terminals. ZhKdispley shows the battery voltage and the charging process. Features Battery charger with microprocessor controller. Charges lead-acid (WET, Calcium, GEL) batteries. Electronic protection against overheating, short-circuit and reverse polarity. resuscitation mode (Desulphation). A general view of the memory 1 - button "Start / Stop - charge control" 2 - Button "current level - to select the charge current 5/10/15 / 20A" 3 - button "Start / Stop - resuscitation mode" 4 - Button "type batteries - the battery type "5 - ZhKdispley.