This battery part reference TSXPLP01 is now discontinued with no direct replacement in Schneider Electric.
See link to our product substitution for confirmation of this: https://www.se.com/uk/en/product-substitution/TSXPLP01
Even though the TSXPLP01 is discontinued you can use any other battery with the same characteristics available in the market.
The TSXPLP01 is a 3.6v lithium battery size 1/2 AA.
Check in our online catalog to view the newer range of PLC's available to replace the one you have:
Alternatively, to check for any product alternatives, please visit our online substitution tool : https://www.se.com/uk/en/product-substitution/