roadhog96 Posted March 5, 2011 Report Share Posted March 5, 2011 This new charger is suppose to communicate with the Lion batteries on it's status before charging. If it's to hot or cold it won't work. If it's already charged it shouldn't start charging. Well I had several new batteries to charge and accidentally placed an already charged battery back into the charger after it was sitting for about 5 minutes. I had checked the Volts on the battery after removing it and it read 18.54V. The charger didn't recognize that the battery was fully charged and continued to charge for about 5-10 minutes before it shut off. I checked the batteries Voltage and it read 19.99V. I had several new batteries and charges I was using. I tried this with a second battery and the same thing happened. Two of the charges continued to charge for another 5-10 minutes before they shut down and all the batteries ended up over 19V. A 3rd charger did not continue after the batteries initial charge, but when the batteries was placed into another charger it did. I doubt this hurts the batteries because every battery I have ever charged reads higher than the voltage rating of the battery. I usually always check the batteries with a Digital Multimeter to make sure the batteries are up to par. I regularly charge 12V car, motorcycle, tractor batteries that read 13-14Volts when done. I charged a 12V Ryobi battery the other day and it was 14Volts when finished. Same thing with my Makita's. I was just supprised that the charger continued to charge the batteries after they were supposedly just charged, and if they weren't why did some of the chargers shut down early. Link to comment Share on other sites More sharing options...
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