ET Recommendations: Own a smartphone with sub-par battery life? Here are four best power banks to choose from

Asus ZenPower Rs 1,499

This is smallest in size compared to other options available today. You get 10,050mAh capacity in an aluminum-anodised body with a single USB port (up to 2.4A output) and it automatically detects when device is connected to start charging.

Boat BPR100 Rs 1,038

It has a backlit LCD digital display for battery level and charging status indicator in an all plastic body. While you get a 10,000mAh capacity, it is the biggest of the four in terms of length. You get dual USB ports (one with 2.1A and the other with 1A output) along with built-in power saving feature.

OnePlus Power Bank Rs 1,399

The 10,000mAh power bank has dual 2A USB ports to charge two devices simultaneously. What makes it different is that it uses lithium polymer batteries that are safer than the lithium-ion batteries used by other chargers. It comes in two colours — white and black.

Mi Power Bank Rs 999

While this is the cheapest of the lot, it is also the highest in capacity – 10,400mAh. It has an aluminum-anodised body, single USB (2.1A output) and uses nine layers of circuit chip protection for safety. The power bank can even detect when the wire is inserted incorrectly and stop charging.