I purchased 2 of these batteries. I have been using one mostly. The second I used as a backup battery. It has been charged three times since I purchased it in November last year. On the third charge the charger was giving me the error that means the control board in the battery is faulty. The other battery I use as my main battery is still working so that is why I have mixed feelings about it. I was charging all of my batteries in preperation for what is now hurricane Dorian since these have a USB that you can power other devices.
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