I´m giving away a (new, unused) bottom module for FP3.
I thought I would need it, but the issue was elsewhere, and I missed the opportunity to send it back.
I will ship it for free in Germany; if you´re living anywhere else, I will ask you to pay the shipping.
NB: If you are interested and want to send a direct message, you will have to be a basic user on the forum. Reference about how to become one and other trust levels can be found here.
Be aware, that cross-border shipment of batteries outside a phone is virtually impossible for individuals.