So glad this guide exists. My 2 year old buds were only lasting 15 minutes.

Opening the earbud was the longest step for me. Hair dryer on high for like 20 seconds. Work a razor back and forth on the edge and then back to heat alternating for like 7 times until I could wedge something else in the crack to pry open.

I skipped unplugging the ZIF connector and had no issues sliding the batteries in and out.

I struggled to mate the boards back together using tweezers or spudger. A fat thumb pressing down on the upper board worked the best for me.