Cell standby use about 35-50% of total battery? I have Micromax canvas 2.2 a114.
I am in strong network zone and use 2g internet all time and time without network is 0%. So why it is consuming more battery. I also never in weak signal.??
What matters is, what is your total battery life, if your phone lasts 2-3 days, then 30% is reasonable, however if it only lasts 8-10 hours, then it isn't.

If it is the latter I would recommend clearing your cache (and davlik cache if you can) and or performing a factory reset and seeing if the problem persists, also try using a different sim card on another network.