DROK USB Output Tester Review

I recently purchased two DROK Dual-USB output charging testers, and I figured I would test out a few devices I had (make sure you read the disclaimer at the end about the RAVPower and Maxboost items).

I decided to use smartphones and tablets I had available for the USB load, however in the future I may actually purchase a 1A/2A USB load device to ensure a consistent load for testing.

Load Devices with load rating based on a quick test

Nexus 7 (2013) LTE: Approx 1A
Nexus 7 (2012) WiFi: Approx 0.6A
Verizon Motorola Moto X: Approx 0.7A~0.8A
Republic Wireless Motorola Defy XT: Approx 0.5A

RAVPower Deluxe 15000 mAh battery pack with two DROK testers and 3 devices

In the picture above you see a rough idea of how the test hardware was setup.  Essentially I connected the phones/tablets (two devices) to each DROK, and then either one or two of the DROKs to each power source being tested.  In the picture below you will see the two testers, and devices tested.

Two of the DROK testers, and the various A/C adapters or USB battery packs

Overall, it was pretty interesting testing all the devices and seeing that in most cases they met or exceeded their rated capacity.  The test was only for a few minutes, not a longer test to see how the devices performed under a heavy consistent load.  Of course, I would not recommend exceeding the capacity of your charging devices.  See below for the results of each test.

RAVPower Two Port A/C Adapter (Model RP-UC02)

Rated : 2.1A

- Port 1: Both Nexus 7s, measured at 1.6A
- Port 2: Both Motorola's, measured at 1A

Results: The adapter was able to exceed the rated capacity, supporting 2.6A total.

Motorola Two port A/C Adapter (White one, from the Moto X I believe)

Rated 1.15A

- Port 1: Both Nexus 7s, measured at 1.1A
- Port 2: Nothing connected, not enough space between plugs to connected 2nd DROK tester

Results: The adapter was able to support just below the rated capacity.

RAVPower FileHub 6000 mAh (Model RP-WD02)

Rated 1A (only 1 USB port)

- Both Nexus 7s measure at 1.12A

Results: The battery pack was able to support just above rated capacity.  Note, this device can also has other capabilities ( file hub and router ) but those were not turned on at the time of my test.

RAVPower Deluxe 15000 mAh (Model RP-PB19)

Rated at 4.5A total (two ports)

- Port 1 (2.4A port): Both Nexus 7s, measure at 2A
- Port 2 (2.1A port): Both Motorola's, measured at 1.3A

Results: The adapter was able to support a total of 3.3A across two phones and two tablets.  I believe the devices were pulling their full load, so I don't think I hit the limit of the battery pack.

Maxboost Electron Mini 5600 mAh (Model MBP-5200B)

Rated 1A (only 1 USB port)

- Both Nexus 7s measured at 2A

Results : The battery back was able to exceed the rated capacity.

RAVPower Savior 9000 mAh (Model RP-PB23)

This device has a built-in microUSB cable (which I can't measure without some adapters) and a built-in USB port which is rated at 1A.

- Both Nexus 7s measure at 1.1A

Results: Device was able to support just over the rated capacity, and which I connected the Moto X to the microUSB port the rating on the USB port did not change so overall the battery pack was able to support 2 tablets and 1 smartphone and seemed to be within rated capacity.

Disclosure of Material Connection: I received the RAVPower and Maxboost products for free so that I could provide product feedback to the company and post a product review. I was not required to write a positive review and I do not rate products higher than they should have been. I am disclosing this in accordance with the Federal Trade Commission's requirements.