AA Battery Charger and Maintainer is a 6V and 12V battery charger that you can use on both gel and acid batteries. This is very dependable and can easily be used on your car battery if it suddenly goes low and improperly working. This is also among the “smart” battery chargers that are popular in the market today. This makes use of a very intelligent microprocessor that is built in its unit. It also works well and have an easy to read LED screen display. You can also expect longevity of life because of its short circuit protection feature, and it is also water and dust resistant. This product is really made to impress you with great functionality and effectiveness.