Padlock 2 won't charge

Recently my Padlock 2's internal battery won't charge. I have to plug it in to unlock it. I even left it plugged in to my computer (unlocked) over night and when I unplugged it to test it the next morning it still did not work. I had to plug it in to unlock it. It's already out of warranty so I'm not sure what can be done.



(I already had to RMA my first one because it kept erasing itself and I would be forced to reformat it :mad: )