Phone keeps going off, battery-coming-out problem?

[equalsabracket]

My phone has started going off for no apparent reason recently and opening the case shows that the battery is slightly loose, so i push the battery back in and can turn it on again?

Anybody else had this, any suggested solution? I've had it for 8/9 months without a problem like this before these past few days.

 

[Slug]

Tape a piece of thin card to the battery or case back to exert more pressure and hold it in place? That would be easily done and 100% reversible.

 

[natnat]

yep, what slug said should do it.
My phone does this occasionaly I wonder if it is the batterie on mine.

 

[equalsabracket]

I tried celotaping the battery in place, still no luck. It's happened 3 times today.

I tried putting a piece of paper in there to keep it pressed in, but even a piece of paper folded over twice is somehow too thick to keep in the case without the back being about to snap off.