Chosen Solution
My new replacement IFIXIT battery will not charge. Out of the box my multimeter read it at 3.81Vdc. I removed the replacement and reinstalled the OEM and confirmed that it would accept a charge. Tried my hand at the IFIXIT battery again just to rule out installation and still no dice. When I power up with the IFIXIT, my battery reads between 9-17% but if I let my phone auto lock it reboots itself. I tested the battery while in the phone and on the charger and it would never raise over 3.84Vdc. I assume I have received a bad battery and I need a solution to this ASAP. I emailed support around midnight last night and have yet to receive a response.
Hey Josh! I just had our CS team reply to your email. In the meantime, I would say re-install the original battery if it’s not too mangled from disassembly, and otherwise you might be tied to a charger until your new one arrives. Great job troubleshooting!