Innovative Technology Justin 10,000 mAh Power Bank Review

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Our tablets have become such integral parts of our lives that running out of power can be a major disaster. That’s why the security of a robust backup battery is so important.

There are a bunch of options on the market designed for phones, but these generally don’t have enough juice to give a tablet a significant recharge. Instead, tablet users need something like the Justin 10,000 mAh Power Bank from Innovative Technology.

Build & Design

It’s unfortunate there’s no such thing as a small and light 10,000 mAh battery. Still, the one that’s part of the Justin series comes about as close as it can. The power bank is 5.6 x 2.9 x 0.6 inches and 8.7 ounces. That means it’s not really pocketable, but fits easily in a gear bag or purse.

Innovative Technology Justin 10,000 mAh Power Bank

Innovative Technology Justin 10,000 mAh Power Bank

As for the appearance, it’s shiny black plastic with silver trim with rounded edges.

There are two full-size USB ports on the bottom edge. One can provide 2.1 A of power, which makes it best for tablets, while the other provides 1 A and is therefore right for phones. Both can be used for either device, though they aren’t optimized well.

There’s a micro-USB port on the right side, used to recharge the Justin Power Bank itself.

On the front is a set of four blue LEDs that show the level of charge available. Next to this is a On button. There’s no Off button – if nothing is connected to this external battery for a few seconds it turns itself off.


One cannot simply compare the amount of power stored in an external battery to the amount in a tablet’s internal one to find out how many times one can recharge the other, as a considerable amount of power is always lost in the transfer.

In our real-world tests, the Justin 10,000 mAh Power Bank was capable of giving the 8,827 mAh battery in an Apple iPad Air a 70% charge. Our tests also showed that the Amazon Fire HDX 8.9, which has a 4,500 mAh internal battery, can be charged 130% by Innovative Technology’s product.

It should be noted that this isn’t a flaw specific to this device – no external battery is 100% efficient in transferring stored power to a second battery.

Justin 10,000 mAh Power Bank with iPad and iPhone

Justin 10,000 mAh Power Bank with iPad and iPhone

Testing an alternate use case, the Justin Power Bank kept an iPad Air fully charged for an entire 8-hour work day, and still had more than a 50% charge at the end.

Recharging this external battery is a lengthy process, taking about 14 hours to go from empty to full when hooked to a 2.1 A USB outlet.


Big storms can lead to lengthy power outages, and with the TV unavailable a tablet can be a great way to keep entertained … but not if its battery runs out. An external battery could also save the day if there’s a project for work or school that must be finished when the Blizzard of 2015 is going on.

The Innovative Technology Justin 10,000 mAh Power Bank (JB-30-10000) can add many hours to a tablet’s life before it needs to be plugged into a wall again, and it can simultaneously recharge a phone or second tablet.

This accessory sells for about $40, and is widely available online.



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