Here's a link to a successful discussion about replacing the Kobo Glo battery:
https://www.mobileread.com/forums/sh...d.php?t=280484
I followed some of the links they gave and found a couple of still valid options. I no longer have a Glo but I have a couple of friends who do so this will be good for them.
I've been looking at both Amazon and Ebay for older lighted ereaders lately, shopping for a couple of neighbors, and I've seen a few Kobo Glo's at pretty good prices. You might look there if you don't want to replace the battery.
Barry
Barry