How to replace it
1．Take the pack out from the house and cut the + (white) wire & - (black) off to separate the terminal assembly out. Be care for the 2 tiny black wires which connect the temp sensor.
3．Insert the tiny temp sensor back into the middle of pack, then solder the + to the red wire and the black wire to the -.
2．Tin the + and - .
4．Put the housing top on this pack AT FIRST and then put the housing bottom on. Done!