APC ES-350 UPS - Can we fit a larger battery in there?

APC ES-350 UPS - Can we fit a larger battery in there?

Original video I stole the "chisel" method from:
https://www.youtube.com/watch?v=eU3Ty83SgVo

In this video I modify an APC UPS (Uninterruptable Power Supply) to take a larger 9AH battery.

Amazon links to batteries:

ML9-12 Battery F2 Terminals:
https://amzn.to/40H6TMG

ML7-12 Battery F1 Terminals:
https://amzn.to/3AqMh0C

Note: I couldn't find a 9ah battery with F1 terminals, so the link above is for a 7ah one.
(As an Amazon Associate I earn from qualifying purchases):

Chapters:
00:00 Important Context
01:05 Disassembly of Unit
01:47 Applying the Surgery
03:35 Important Caveats