And this one from GPED is discounted to $20 on clearance, 60% off the full price of $50. Get it! Powered by a 6A lithium battery of its own, the 12V smart charger is controlled using a built-in ...

the battery maintainer's charger output should be at least 10 percent of your battery's total amp-hour rating. For instance, if your car has a 50 amp-hour battery, you should look for a maintainer ...