TOPDON car battery charger. This is a very useful thing that combines two functions at once - charging station and diagnostics. This charger can charge any lead-acid batteries - conventional, gel, AGM, LiFePO4 and others. And there is a special 9-stage algorithm for the most efficient and gentle charging. In addition, you get a full-fledged tester that shows the battery capacity, internal resistance, voltage and other parameters before and after charging. So you can see at a glance how much charging has helped the battery and whether it's time to change it. Well, the whole process is controlled through a special application via Bluetooth. There you can set the desired current and voltage of charge, set a timer and so on.