i recently bought a ups with output 24v dc going to charge my old batteries which both is 12v 200ah each connected in series . the batteries are about 3 years old . i have charged it using my new ups for about 35 hours but the total voltage in the batteries are still 19.5v .
so i was wondering how long would it actually take to charge it to 24v. or are the batteries actually spoiled ? The batteries used are lead acid batteries .
so i was wondering how long would it actually take to charge it to 24v. or are the batteries actually spoiled ? The batteries used are lead acid batteries .