kuushEnthusiast
 lvl.1
United States
Offline
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Hi,
I didn't charge my pack of tello batteries for 6 months and couldn't get them to charge again until I connected a 3.3 v watch battery to them. Here's a link to my video and a pic of how todo it. https://youtu.be/btLclAVnBRM
Hope this helps,
Kuush
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