Battery replacement costs

I have an opportunity to buy a used op-1 but it has battery issues and doesn’t hold a charge very long. Any idea on what this costs and what kind of timeframe to repair?

https://www.ifixit.com/Guide/Teenage+Engineering+OP-1+Battery+Replacement/65563

Yikes. I am not that talented. Anyone have experience with sending to TE?

It’s easier than the guide makes it looks @jameshays. You can buy a phone repair kit off Amazon that has everything you need, and can buy a replacement battery from Aliexpress for $10 or so!

I got a new encoder board and battery replacement through official channels for $140 including shipping. I considered it a good deal. However, the whole process took well over a month.

I then replaced the keyboard myself w/ iFixit parts. That was easy. They don’t seem to carry the battery, tho?