A precisely measured voltage ensure there won’t be a surge of current that could damage your car’s electronics. Make sure the vehicle is off ie. the engine is not turned on and the electronics are not turned on.

Charge dead batteries – Charges batteries as low as 1-volt. Or use the all-new Force Mode that allows you to take control and manually begin charging dead batteries down to zero volts.A: It actually depends on the type of a vehicle battery charger you use. Typically, a battery charger should be left connected to a battery until the battery is fully charged. If you're planning to utilise a manual charger, it should be disconnected as soon as the battery charge level has reached its full. The point is that such chargers do not shut down by themselves and continue to supply electricity to the battery even in case the battery has got already charged. Automatic chargers, in turn, usually ensure optimal charging mode and prevent overcharging of the battery. Automatic chargers don't change operational parameters of a battery to such a large extent as manual chargers, however, they are also not designed for an uninterrupted use with batteries. Therefore, it's reasonable and safer to disconnect car battery chargers from the battery after the charging is complete. The only real pretender to CTEK MXS5.0’s throne (we also made a full review of the GENIUS5UK (UK version)specifically) Now we’ll give you some tips on battery charging, as well as how to make your buying decision. Car Battery Charger Buying Guide

Firstly, there’s no need to disconnect or remove the battery from the vehicle. Leave it in the engine. Maybe you already know, but if not pop your bonnet up and take a look. The vast majority of cars and vans have 12V Lead-acid batteries. Such a complex mechanism and component of a car as a battery has several important factors which affect its overall performance. To understand how to maintain the battery, you need to consider each factor separately: Equally, AGM batteries must be charged at specific voltages, and can be damaged if a ‘normal’ charging voltage is used to charge it. Therefore, your charger should either have an AGM mode (like the CTEK MXS5 AGM Mode), or be sophisticated enough to automatically identify an AGM battery when it’s connected to the battery.By the way, we didn’t include the CTEK MXS 7.0or the CTEK MXS 10 on this list as they’re so similar to the MXS5.0 (except with more power), but we’ve done a full MXS10 review.