♦ size: 6 3/8" x 3 1/4" x 7/8"
♦ weight: 15.15 oz
♦ number of ports: 2
♦ flashlight: yes
♦ pass through charging: no (i.e. the battery can charge while being charged itself)
♦ cable: 7.5" charging cable
This external battery is very compact for its large capacity of 20800 mAh. It has two ports and came with a short charging cable (charging cables are more efficient charging the phones then the data cables, that charge at USB rate).
I really like its charge level indicator, it is shown in LED window as a percentage rather than just lights.
This charger performed very well with my Android phone. It worked with my iPad Mini but my current monitor showed that one neither of the ports drew more than 1A. I am including the details of the tests at the end of the review for those who are interested in the nitty gritty numbers.
To see how well different chargers and external batteries charge my mobile devices I use a Nexus phone and an iPadMini to test each of them. I do my tests with the devices charged to the same level, running the same applications and using the same cables to keep everything the same. This allows me to compare them to each other in a fair way. I use the current monitor to see what current is delivered to each device which tells me how well each external battery is working.
I also tested to see if the battery supports pass-through charging (i.e. whether the battery can charge mobile devices while it is being charged). This battery does NOT support charger through chargng. It can not charge while being charged.
In addition to testing with my own cable, I test the cable included in the package to see if it is a charging cable or a data cable. This package includes a charging cable. For Android devices it matters if a cable used to charge the device is a charging cable or a data cable. In a charging cables the two data connections are shorted together (rendering the cable useless for data transfer), but this fools devices to see the cable as an AC power connection and thus the battery accept a higher current for charging. Most of the time external batteries come with a charging cable, but every now I run across a manufacturer that encloses data cables with external batteries. It is not easy to tell what cable you got unless you have a current monitor. I always include this test in my reviews so people can improve the performance of the battery by switching to a charging cable.
The battery also has a small flashlight. It is not very bright but could be useful in an emergency. My video include a demo of the flashlight so you can see it yourself.
Samsung Nexus phone:
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1A port: 1.01/4.99V (excellent)
2A port: 1.02/5.01V (excellent)
(for comparison the best charging monitor result for this phone is 1.00A/5V)
iPad Mini tablet:
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1A port: 0.92A/5.01V (average for 1A port)
2A port: 0.92A/5.02V (below average for 2A port)
(for comparison the best charging monitor result for this tablet is 1.70A/5V)
I have been using this battery for several weeks without problems as I write this review. It does the job and does not get warm as it is charging. As far as capacity some of the battery capacity is always lost to heat, voltage conversion, and operation of the power bank itself. I always estimate that 30% of the capacity will not be available for the charging of the device.
You can find it on Amazon by following this link.
Ali Julia review ★★★★★
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