This external battery has a large capacity of 212000 mAh and two ports for charging. It takes me 12 hours to fully charge the battery from almost fully discharged state to full.
This external battery does not have a smart charging chip, which means one port (1A) is better (i.e. faster charging at AC rate) for Android and one port (2A) is better for Apple devices. If you try charging your Android phone on 2A port you get USB charging, not AC charging.
The battery is fairly compact for this capacity. It weighs 15.9 oz, 6" x 3" x 3/4". I have been using this battery for just about 2 weeks as I write this review. It holds the charge quite well (very little loss when disconnected) and the capacity rating to appears to be accurate.
The battery does not support charge through charging (i.e. it cannot charge while being charged).
The battery has a built-in flashlight. The flashlight is not bright, I find it only marginally useful.
I received this power bank for evaluation and review at a special discount.
You can find it on Amazon by following this link.
Ali Julia review ★★★★☆