With faster processors and ever-growing display resolution, the battery life for smartphones remained the same even though all manufacturers have put in effort to improve the power efficiency of our devices. As more and more phones are using non-removable batteries, a power bank seems to become a necessity, whether you like it or not.
Luckily, there are some affordable options in the market from manufacturers like ASUS and Xiaomi. We have just reviewed ASUS’s 9600mAh ZenPower and the review of Xiaomi’s 10400mAh Mi Power Bank was done back in 2014. So why not compare the two most affordable power banks we have in the market?