Opening up the battery compartment was a bit tricky. I was prepared for this after viewing Alan Falcks video on Youtube, so I took my time and was careful. I think it survived, but a connector for what I assume is a part of the BMS came loose. I just showed it back in with a screwdriver.

The battery compartment consists of two plastic shells, and they are fixed with six bolts. Use a 3 mm Allen key to remove them. Obviously this will void your warranty. This is the easy part. The tricky part is separating the shells without breaking something, as both shells are taped to the battery pack with double sided tape, and the BMS is bolted to the lower part. Make sure you don’t pry on the wrong side, as you might break the connections to the BMS. I used a wide chisel on one side to get a small crack, and then I used the same chisel inside a rubber assembly glove, inserted it between the battery pack and the plastic shell, and then carefully twisted it. Rinse and repeat until you have opened the pack.

Here are some photos of the process. First removing six bolts:

Then I used the chisel to get this opening:

Success!

Here are some details for your viewing pleasure: