Regularly discharging a lithium battery to 15% is going to kill it pretty quickly. The ideal charge point for long life is 50%. 40% isn't too bad. 15% is bad.I usually get about 3 charges from 15% to 100%
I have an anker. It's the best selling brand on Amazon.com it's 10,400 MA and has a quick charge port. I usually get about 3 charges from 15% to 100% off of it. It was 23 bucks.
Posted via the Android Central App