My minivan had not been used for 5 weeks, the battery was down, voltage was only about 10.30v. I first used Century Charger to charge it, no miracle happened. So I jump started my van, and had a 200 miles long distance drive to recharge it. The battery failed again on the second day. I searched on internet and bought this CHARGER. It miracally recharged my battery to 13. 6v, and the battery started my van in the 1st try. Unfortunately my battery can not hold the charge for long, it dropped to 10.3 in 1 hr. I will try a diy method: slow charge with a laptop computer adapter
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