Mos Go review: A flawed battery pack

Mos Go review: A flawed battery pack

Note: The following is part of our roundup of USB-C battery packs.

When I first opened the Mos Go battery pack, I pegged at as my top choice for a small, portable battery. I was so wrong.

From the initial charge, connecting it directly to a USB-C cable and wall adapter without any extra equipment, I felt as if it was taking far too long to charge.

Once it was fully charged, I tested the efficiency of its 12,000 mAh (44.4Wh) battery and it came in at a respectable 86.37%. At that point, I was loving its compact design, two USB-C ports and a single USB-A port.

Then I began to measure the amount of time it took to recharge, and was left puzzled by its recharge specs of 5V/0.579A. That means it takes a crazy 15 hours to charge the Mos Go from empty to full

I tested every USB-C cable and wall adapter I own in an effort to troubleshoot the puzzling charge time, with no luck.

In comparison, the biggest battery I tested was more than double this capacity and took under 10 hours to completely charge. And the RAVPower recharged in four hours using USB-C.

I brought up the issue with the team at Mos, and it seems a firmware update will correct the issue I experienced. Unfortunately, it’s not something that I can load into the battery pack myself. I have requested a fixed unit when the team has one available, and will update this review if needed.

As for the rest of the unit, there’s a dedicated USB-C port for charging (marked as OUT), another for the device itself (marked as IN), and a USB-A port for charging standard smartphones not in need of QC 2.0 and the like.

The indicator lights are just above the Out port, with a gentle shake bringing them to life to give you a quick glimpse at the current battery level of the Mos Go.

IDG Insider


«Kanex GoPower USB-C review: A battery pack that looks like Apple designed it


Battling gender bias in IT»
IDG Connect

IDG Connect tackles the tech stories that matter to you

Our Case Studies

IDG Connect delivers full creative solutions to meet all your demand generatlon needs. These cover the full scope of options, from customized content and lead delivery through to fully integrated campaigns.


Our Marketing Research

Our in-house analyst and editorial team create a range of insights for the global marketing community. These look at IT buying preferences, the latest soclal media trends and other zeitgeist topics.



Should the government regulate Artificial Intelligence?