'''Ear pad / Speaker'''
Both hinge pins are quite long and look like this:
[image|1872145]
They fit into holes in the ear pad / speaker assembly. I wouldn’t worry though which side you disassemble first. Though the hole approximately opposite the power switch looks easier to slip onto its pin:
[image|1872146]
It appears both would be equally difficult to disassemble:
[image|1872148]
'''Battery'''
Any li-po battery with a thermistor (white) lead, approximately the same maH rating and PCM should do. The [https://www.aliexpress.com/item/33037728102.html|XINJ LP502035] in my spare parts bin fits a bit too snugly, but works:
[image|1872147]
Yes, despite the above advice, I managed to break off a pin. :(