Mophie Powerstation Keychain Portable Battery REVIEW

Since smartphones play such an active role in our lives these days, it’s important to have a power solution nearby to make sure you always have your mobile phone at the ready. It’s been a long time since I’ve carried a power bank with me everywhere, but I found that the Mophie Powerstation keychain is the ideal option for a little emergency boost when you are running low on power.



  • COMPATIBILITY: Palm, Samsung Galaxy, Google Pixel, & other USB-C devices
  • DIMENSIONS: 3.15 x 1.5 x 0.6in (80 x 39 x 15mm)
  • WEIGHT: 2.1oz (60g)
  • WARRANTY: 2-year Warranty
  • IN THE BOX: powerstation keychain / carabiner / quick start guide


During my testing of the Powerstation Keychain, I attempted to charge my iPhone XS Max, 2018 11” iPad Pro, Sennheiser Momentum True Wireless headphones, and a Sony Xperia 10. Each of these devices yielded different results. The iPhone XS Max is compatible with wireless charging or Lightning cables and docks. I did, however, have a USB-C to Lightning cable available so I thought I would attempt to charge the iPhone using the USB-C port located near the eject button. I found that the port is not a two-way power delivery port and can only be used for recharging. So, the USB-C to Lightning cable did not work to charge my iPhone.

Next, I tried to use the Powerstation Keychain to charge the iPad Pro. Because the power output on the Powerstation is listed as 5V/1A on the back of the battery, I didn’t think it would be able to charge the iPad, but since the iPad utilizes USB-C for charging, I thought I would see what would happen if I plugged it into the Powerstation. The battery icon in the menu bar ended up flashing. It would appear to start charging but then blink off of the lightning bolt icon that typically indicates charging. So, I unplugged it rather quickly. Since most tablets require at least 2A in order to charge, this is the response I actually expected to get. To be fair, there are no tablet models listed in the compatibility list from Mophie for the device and the power output listed on the battery doesn’t indicate that it should work.

After attempting to charge the iPad, I moved on to the charging case of the Sennheiser Momentum True Wireless headphones. This charging case uses USB-C and only requires 600mAh to have a full charge. I plugged them into the Powerstation and there was no problem getting the case charged up to full. Since my primary phone is an iPhone, I feel like this is the perfect use of the Powerstation for me — recharging my earbuds.

Finally, I plugged the Sony Xperia 10 into the Powerstation. This is a smartphone that is designed to charge using USB-C. There was a small ding that told me that the phone was charging and so I left it to charge. When I plugged the phone in, it was showing 1% battery and the Powerstation was showing 4 LEDs , which meant it was between 75–100% capacity. I did charge the phone after I charged the headphone case so I could assume that approximately 25% of the battery was used up before I plugged in the phone.

I checked the status of the phone and power bank after about 10 minutes and the phone had gained 10% battery while the power bank was now showing only three LEDs lit. I noticed at this point that the power bank was a bit warm, but not hot. After about 10 more minutes, I checked the status again and found that the phone was at 25% and so was the power bank. After a total of 45 minutes, the phone had gained 27% and the power bank was completely depleted. The Sony Xperia 10 has 2870mAh as battery capacity. That’s nearly 2.5 times larger than the Powerstation’s capacity. Given those specs, I actually would expect to get approximately 41% battery life from a fully charged Powerstation Keychain. Since the Powerstation had been used previously, I think gaining 27% battery power was the proper amount for what was available from the power bank.


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Originally published at on March 28, 2019.



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