I bought second hand, defective controller for myself. I expected easy fix, like swapping battery, because seller said it's not charging properly.
I opened it, and i saw oxides on two chips. It needed few cleans, controller was charging, but when i charge battery to full and leave it overnight, next day i have dead battery. So i installed a new battery, same thing.
I even reflowed both chips, to make sure. No corrosion, only oxides.
What could cause such thing?
I attached photos with damage i have found.
I opened it, and i saw oxides on two chips. It needed few cleans, controller was charging, but when i charge battery to full and leave it overnight, next day i have dead battery. So i installed a new battery, same thing.
I even reflowed both chips, to make sure. No corrosion, only oxides.
What could cause such thing?
I attached photos with damage i have found.
Attached Files
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