Moshi's IonSlim 10K Portable Battery Offers Big Power in a Tiny Package

Moshi always makes impressive, well-designed gadgets; but the IonSlim 10K ($99.95) in particular packs a lot of power into a slim aluminum shell, reminiscent of anything coming out of Apple these days. As Apple is now shipping devices that charge via USB-C as well as Lighting USB-A cables, there is a need for a portable battery pack like the IonSlim 10K.


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The IonSlim 10K offers two ports, USB-A and USB-C, and delivers 10,000 mAh. It can even charge two devices at once, with one of those devices being a MacBook Pro. It can deliver 30 watts of power, so it's well-suited as an emergency backup power source. I would like to see more color choices, to match Apple gear, but the one color choice is comparable to Apple's Space Gray. It's not cheap, but there is a $54.95 5K version as well.


  • Slim, compact design
  • Aluminum finish
  • Two ports, USB-A and USB-C
  • 10,000 mAh
  • Charge two devices at once


  • Only one color
  • Pricey

Final Verdict

The IonSlim 10K from Moshi packs a lot of power into a light and compact and stylish package. 

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Todd Bernhard is a bestselling (6+ million downloads) award-winning (AARP,,, Digital Hollywood, and Verizon) developer and founder of NoTie.NET, an app developer specializing in Talking Ringtone apps including AutoRingtone. And his profile photo is of the last known sighting of Mr. Bernhard wearing a tie, circa 2007!

An iPhone is almost always attached to his hip or in his pocket, but over the years, Mr. Bernhard has owned an Apple Newton, a Motorola Marco, an HP 95LX, a Compaq iPaq, a Palm Treo, and a Nokia e62. In addition to writing for iPhone Life, Mr. Bernhard has written for its sister publications, PocketPC Magazine and The HP Palmtop Paper.