Where to cut wires for expired Apple battery
Expired Apple battery has a sliver of a circuit board (approx 1" by 1/8th ")within plastic & foil that wires attach to-- Should wires be cut so that this small board is soldered to new good battery or is that piece to be discarded with bad battery?
My guess is that you are referring to this whole assembly, and the answer is no, the wires to not need to be cut. However, they do need to be de-soldered from the old battery. iFixit has replacement batteries if you need one. It is a simple soldering job, with only two contacts to be detached/re-attached.
Installation requires soldering / 250 mAh — 21 available at 14.95 each.