I found out that my calculator (TI-nspire CAS Clickpad) turns off suddenly if I press under the cover of the battery.
Unfortunately, sometimes, even just moving it, turn off, and this problem makes it unusable.
After some tests I found that the problem stems from the button marked in yellow, as in the figure.

Someone can tell me what is this button?
Do you know a way to fix this?
Thanks in advance
Regards
