Inside the maintenance free battery

[rockhouse66]

I believe this to be the Odyssey PC925MJT battery, which retails for $200+.  Not much savings here buying one of these and DIY'ing the job versus just buying another repro.  Most recently, I have been using the battery linked below.  It does a pretty good job and lasted 2-1/2 years.  Cost is about $110.  The catch with this one is it is too tall for the case by just a tiny bit.  I cut a hole in the bottom of the case just the size of the battery and glued a piece of Masonite on the bottom.  The difference in thickness between the case material and the masonite was enough to allow the top of the battery to just clear so you can reinstall the lid.

https://www.azbatterystore.com/Power-Sport_Batteries-12_Volt_30_Amp_High_Performance_Sealed_Battery.html