Recharge a phone with Charge Ninja, a $29 credit card–sized battery


There’s no lack of portable batteries on the market that can recharge a handset. Most focus on having enough capacity to fully charge your phone at least once, however, which can make for a bulky device: It’s often the case that the more power capacity, the bigger the battery. That’s why the Charge Ninja, a $29 portable battery, caught my eye. It’s the size of a credit card and only weighs 30 grams, so it’s easy to take anywhere.

Charge Ninja

Charge Ninja is a new Indiegogo project looking to raise $21,000 by October 8. I like the price as well as the size because $29 is far less expensive than most competing products. The project was smart to keep the device small as well: Aside from the 7-millimeter thickness to fit a full-sized USB port, most of the Charge Ninja is only 5 millimeters thick, about the size of five credit cards stacked on top of each other.

Because the Charge Ninja is small, it can only charge an [company]Apple[/company] iPhone 5s, for example, from zero to 85 percent due to the 1500 mAh battery capacity. Unless you plan to be away from an outlet for multiple days, that’s likely plenty of juice for most people.

Included in the $29 pledge is a charging key: A keychain that opens up to become a USB-to-micro USB cable. iPhone owners can add another $10 to their backing for a USB-to-Lightning charging key. That additional cost is due to Apple’s Made for iPhone licensing fees.

Charge Ninja sync

One other bit I like about this device: The Charge Ninja will prioritize charging to a connected phone before it recharges itself. That means you can daisy-chain a phone to the portable battery and recharge both from a computer: This configuration will top off your phone and then the Charge Ninja. For $29 in a choice of black, white or blue, count me in.



I wish you would stop sending email notifications of new crowdfunded projects and remove them from your main page.

Kickstarter and Indiegogo have become little more than shielding frameworks for scammers and grifters. You do your readers absolutely no service by directing them toward projects at these sites.

If you must cover new croudfunded products at all please put them in a separate tab at the top of your page with a nice big caveat emptor disclaimer when one gets there.


Reblogged this on Survivor and commented:
This is great, my answer to charging when I’m not home and posting from else wear. Sometimes I use my iPhone it runs my battery down.

Vin L.

I don’t know, Kevin. Anker has a similar product (Look for the Anker Astro Slim3) that carries 6000mAh (which is A LOT) without much of a size penalty.

Kevin C. Tofel

That is a nice capacity. It’s also the size of an iPhone based on the images. You could almost tuck the Charge Ninja in a wallet; no can do with the Anker model.

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