Ryobi Zero Turn ZT480ex 48v 42" 100AH
Battery swap to Lithium.
First of a few videos detail the battery swap, wire, and replace battery meter.
This video is a list of the purchased components and suppliers. Prices subject to change.
And also details the modifications to the Charger port on the Ryobi mower.

DC 8-80V 100A TR16 Battery Coulomb Meter Capacity
$23.56 AliExpress free shipping
https://www.aliexpress.us/item/325680...

HTRC 48V Golf cart battery charger 13-Amp Smart Charger, LiFePO4,for EZGO RXV & TXT,Car, Boat..
$155.99 Amazon free shipping
OLD link, not working - https://www.amazon.com/dp/B0BKZ2R94T?...
NEW link (4/3/2024) - https://www.amazon.com/dp/B0BZY6N951/...

4Pack CHINS LiFePO4 12V 100AH Lithium Battery w/100A BMS
$1,067.96 free shipping
https://www.walmart.com/ip/4Pack-CHIN...