5. Lenovo K80 – 4,000mAh

Right from the start Lenovo K80 was considered as a rival to ASUS ZenFone 2 4GB RAM. At the moment, it’s still a good model coming with a 4,000mAh cell, a quad-core Intel Atom Z3560 1.83GHz chipset, 4GB of RAM, 64GB of ROM (non-expandable), a 5.5-inch Full HD display, Android 5.0 Lollipop OS, and a dual SIM. To take pictures, you can use either its 13MP main or 5MP selfie snapper. In general, Lenovo K80 is an excellent smartphone when boasting a big RAM and battery capacity at the same time.

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