The TG7630R MICRO⋅TAC laser uses (4) LR626 batteries.
The TG7630G MICRO⋅TAC laser uses (6) LR626 batteries
Replacement batteries can be ordered from the TRUGLO website:
PRODUCT CODE TG988E: BATTERY AG4 12 PK
https://truglo.master-7rqtwti-evtrxkbyim2ii.us-3.magentosite.cloud/truglo-replacement-batteries