Tasco 119256CW Instruction Manual page 20

Camera won't retain settings
1. Make sure that you have been saving the changes to any parameter
settings that you made while in Setup mode, by pressing "OK"
after changing the setting. If you don't save your new setting after
changing it, the camera will continue to use the original default
setting for that parameter.
Do not mix battery types-use ALL lithium or ALL alkaline.
Rechargeable batteries are not recommended.
20
Troubleshooting / FAQ
Do not mix old and new batteries.