I used to have a cheap Android Hand Phone with the price of US$ 60. But when I use the internet, in 3 hours the battery is empty. So I cannot make a phone call or receive SMS. So I turn off all the internet application there to keep the battery last longer. May be the battery is only 1,200 mAh or less. Not to mention the very slow processor. The advantage is, I will not be so sad if someone steal the hand phone. I have a peace of mind...:)
But with Lenovo P780 with 4,000 mAh battery it could last up to 43 hours though all internet application such as Blackberry, Whatsapp, Facebook, etc. are up. The charging time is around 4 hours.
The hand phone is quite fast and responsive. It has 2 slots for SIM card. The price around US$ 280.