A car battery charger ... 6- and 12-volt batteries, including AGM, deep cycle, gel-cell, and maintenance-free. There is a low 6 amp charge cycle, which means it will not be fast. A 2 amp ...

The 12-volt battery ... winter, 2 to 10 amps is a better bet. Any capability above that is mostly for mechanics who need to quickly charge or recondition batteries in the shop. Every charger ...

Most modern cars offer at least two ways to charge up a smartphone, in the form of a 12V ... 2.1A or 2.4A. For comparison, many USB ports in cars output just 0.5A, which means your phone battery ...