In what seems like our never-ending journey to find the best external battery pack, we may have stumbled over something to pay attention to. We’ve already taken a look at Lumsing’s 11,000mAh 5-Port Battery Pack, and told you to run out and buy one. There’s a new product out from the company, and we love it.

The Lumsing “Harmonica Style” 10,400mAh Power Bank is our favorite yet, and for the price, you won’t find a better option.

ATTENTION: We’re giving one away! Head here for the contest rules!


The battery pack is made from plastic, with a smooth finish. There’s a faux-brushed metal lining towards the bottom, which adds a premium feel to the device. On the front sits a power button, 4 blue LED lights, two outputs, and to the side, the Micro USB input to charge the device. Other than that, the edges are smooth and sleek.

Lumsing 3

Unlike the previously reviewed battery pack, the “harmonica style” option only has two outputs – one 1A, and one 2.1A. It’s not necessarily a deal-breaker, but we would have liked to see more.

Included with the battery pack is one Micro-USB cord that is about 1.5 feet long. It offers a flat shape to decrease it’s ability to tangle. It’s not horribly long, but you may find yourself not needing an overly-lengthy cord. For car rides, plane rides, or setting it on a table, the 1.5-foot long cord will be enough.

Overall, the design is great. It’s smooth, sleek, and offers a unique design.


Lumsing 6

The performance of this battery pack is great. It does exactly what it’s supposed to do. The ports charge as quickly as they should, and the LED lights are an accurate depiction of how much battery is left. Lumsing is quoting that it will be completely charged in 6.5 hours, and we’d say that’s very accurate.

With this power bank, we’ve charged a Nexus 5, Nexus 7 (2013), Pebble Smartwatch, and a Galaxy S3. It hasn’t given us any problems with the charging process, which is what we need.

Should you buy?

Lumsing 5

Being totally honest, yes. With a battery size of 10,400mAh, the quality of cord that’s included, and the design, this is exactly what we’re looking for in a power bank. If you can get passed the fact that it only has two outputs, you should buy this.

Pick one up on Amazon for $19.99 in black or white variants. It has excellent hardware, a great big battery, and does what it should.

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  1. I love external battery chargers. But I already bought one 14,000mAh from RAVPower. It has two ports for charging two devices at the same time. Even more, it has a builtin flashlight which can be very useful to lighten things up.

  2. I had this harmonica style battery and I can tell you it is the worst design ever.external battery packs should be designed for ease of use on the go this one does not offer that ability. trying to carry this around in your pocket while having your device connected to it is very bulky. as well with the battery I purchased the charge didn’t hold

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