This question is more to understand why it hasn't work for me, this is the case: I have an old Kindle 2nd generation e-reader, the batteries are almost depleted, working just a few minutes. So I have this other batteries, from a phone, same voltage a little more mah, 1530mAh vs 1500. The size was almost the same, so it seems to me that it was worth the try. Removed the kindle's battery little board and connected the battery cell to it, but it didn't work, so I wanted to know why.
Thanks.
