microUSB version 2.0, USB On-The-Go Weight: 176 grams
The A series from Lenovo are entry level handsets that are aimed towards first time smartphone buyers. The A850 is one of the better offerings in the series. The device has a 5.5 inch IPS display with a resolution of 960 x 540 pixels (qHD) and the pixel density is around 200 PPI. The screen resolution is low for a display of this size and it might appear pixelated on closer inspection. The phone has a 1.3GHz Quad-Core processor with 1GB of RAM. This combination is used in a lot of phones and is known to provide a decent smartphone experience.
The A850 has 4GB of internal memory and has a microSD card slot which accepts cards upto 32GB. The phone has a 5 megapixel autofocus camera, paired with a flash. There is a front camera present but sadly it has a VGA (640 x 480pixels) resolution. The device runs on Android 4.2.2 Jelly Bean and there is no official word from Lenovo for future updates. It is a Dual SIM device and has a 2250 mAh battery. The phone weighs 184g which is heavier than other similarly sized phones. If you aren’t looking for a big screen phone, the Asus ZenFone 5 is a better phone for the price.
If you thought the Lenovo P770 had a big battery, they've just taken it up a notch with the P780. A better model than the P770 in many ways, the P780 has a bigger 5-inch display with a higher 1280 x 720 pixel and IPS technology. The chipset is also upgraded to a quad-core 1.2GHz by Mediatek — the same chip you'll find on popular phones like the Micromax Canvas 4. The P780 has the same 1GB of RAM and 4GB internal memory. But enough about all these specs — the star feature of this phone is its humongous battery. The P770 had a 3500 mAh capacity battery, and the P780 pushes it further to a whopping 4000 mAh. The manufacturer claims 43 hours of talktime on 2G, and 20 days of active standby. Plus, with USB-on-the-go support, you can also provide charge to other phones. Lastly, the camera on the P780 is also upped to an 8 megapixel sensor.