Though they take up little space in your bag, a portable battery is a godsend for frequent travelers, or for those times you end up being away from a charging station longer than anticipated. A portable battery is only as useful as its ability to charge your phone, however, and there’s one big downside with most portable batteries: you can’t see how much charge they have left, or you have to guesstimate using a few LED indicators. Enter the Intocircuit 11200mAh battery — it has a built-in display showing the percentage of charge left, among other things.
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https://www.slashgear.com/intocircuit-11200mah-portable-battery-mini-review-25399279/
