In the worst case, the charger doesn't have a sane voltage limit and thus requires you to observe the charging time and disconnect the charger when you expect the battery to be full of charge. This review discuses the pros and cons of this 12 volt battery charger.more. The very best are temperature compensated. Subscribe 5.7K views 2 years ago Nimrod reviews the Cen-Tech Battery Charger from Harbor Freight Tools. I'm not sure how good your charger is, but many these days are microprocessor controlled, so they have all of the 3 stages. Many lead-acid batteries only allow 25% of the capacity per hour: 2 amperes could then be used to charge at least 8 amp-hour batteries, whereas 10 amperes could be used to charge at least 40 amp-hour batteries. For example, a motorcycle battery could use the 2 ampere charging option. A HAND HELD SPOTLIGHT AND BATTERY CHARGER, CARRYING CASES SPECIALLY ADAPTED FOR POCK- ET CALCULATORS AND. You would use 10 amperes on a car battery and 2 ampere on whatever small batteries you might want to charge that still use the same voltage. E - CORE TECHNOLOGY COMPANY, FRANKFORT, IL. The 2 ampere and 10 ampere options allow charging different capacity batteries. Lead-acid batteries are charged in 3 stages, first by constant current (with voltage limit), then by constant voltage (with tapering current), then in the end during float charge the voltage is reduced to a float charge voltage level. You're right that 10 amperes is faster, by a factor of 5x.
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