Product review: DBK 23000mAh Multi-voltage 2USB Portable Charger External Battery Pack Power Bank

♦ size: 4.75" x 7.25" x 0.75"
♦ weight: 20.90 oz
♦ number of ports: 2
♦ flashlight: no
♦ pass-through charging: YES (i.e. the battery can charge while being charged itself)
♦ cable: 10.5" mini USB charging cable. Also included are 10 AC connectors for laptops as well as an AC cable to recharge the battery.
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.

The DBK 23000mAh external battery charger has two ports. It has an excellent performance for my Android devices on both ports. My current monitor shows that the left USB port is 2A and the right USB port is 1A port. I got excellent performance for my iPad mini on the right port (2A) and below average performance on the left port (not surprising, since Apple devices need more than 1A for optimal performance).

To tell how various battery packs perform I measure their performance with a current monitor. The current monitor results are interesting for relative comparison with other external batteries. I test all my external batteries using the same charging cables, running the same apps while charging, and starting all tests at same charge level of the phone to account for non-linear charging. This allows me to compare different external batteries to each other keeping everything else constant.

Samsung Nexus phone:
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1A port: 0.98A/5.10V (Excellent!) -> my own charging cable
2A port: 0.98A/5.10V (Excellent!) -> my own charging cable
1A port: 0.98A/5.10V (Excellent!) -> cable enclosed in the package
2A port: 0.94A/5.10V (Excellent!) -> cable enclosed in the package
(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/5.09V (below optimal)
2A port: 1.62A/5.10V (Excellent!)
(for comparison the best charging monitor result for this tablet is 1.70A/5V)

I like this external battery's performance and its huge capacity.

You can find it by following this link

Ali Julia review ★★★★★