Unpleasant experience with BBM for Android app

2 weeks ago Blackberry launched their long waited BBM for Android and iOS app. Trying to get ahead, I applied for BBM PIN and got it almost straight away, posted it on Facebook and got few friends who are still loyal to Blackberry.

Everything works fine on my HTC Incredible S for few days and then notice that my mobile keeps shutting down by itself due to battery issue. Even after uninstalling BBM and resetting the phone to factory reset I am still having that issue. My battery will not last longer than 2 hours.

Now I am waiting for my new battery which I ordered from ebay, hope this will resolve the issue.
I  promise myself not to use BBM app from now on, whatsapp is still the best.