PS6010XV Control Module Battery High Temperature Warnings

I am getting Event Log entries on my out-of-warranty EqualLogic PS6010XV toggling between:

28.3.114 Control module 0 battery sensor temperature of 46C is above the warning threshold of 45C.

and

28.2.29  High-temperature sensor reading is now within operating limits.  

The other control module battery is at 39C.

1) Can I temporarily raise the warning threshold to stop the hundreds of email messages per day I'm getting?

2) Can I replace the battery on a control module?

Thank you for your help.

Alan