It worked, but I would suggest this still belongs in here.
Got myself a couple of rechargeable 2032 batteries. No HR this morning means battery is flat. Hmmmm, how should I charge it? One day I'll get a bench top power supply, but that doesn't help me now.
Rigged up this, and it worked...... kinda. Just kept cycling through the initial startup phase, but I noticed the voltage just kept slowly increasing. Input voltage was nice, between 2.5-3.6v. Once it got up to 3.3v, I pulled it out. Probably took about 10min or so.
I'll see if it works in the morning.