Blackberry 9320 screen keeps coming on randomly

[#1]

We've got a BB 9320 on Giff Gaff that we've had for 11 months. In the last few days the screen seems to light up randomly without any messages or calls being received. We can't stop it. It's running the battery down. We done restarts and battery removal but don't know what to try next. Any suggestions?

[#2]

Try display settings an turn of back ground lights might help

[#3]

You've got a dodgy battery!
Happened to me aswell,
You would need to purchase a another battery.

You could buy one off your local mobile shop or just buy off eBay
All the best mate and takecare

[#4]

you will need to get a new battery for this 

[#5]

Battery on ebay from 4 quid to 15 quid m8

[#6]

Thanks for the advice all.
Merry Christmas.