Intocircuit Portable External Charger

Last updated date: April 12, 2019

DWYM Score
8.0

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We looked at the top 1 Portable Chargers and dug through the reviews from 9 of the most popular review sites including BestReviews, Tech Walls, Heavy, Gadget Mac, Jeff Geerling, IT Pro Today, Ginae Reviews, Calculated Traveller, Droid Horizon and more. Through this analysis, we've determined the best Portable Charger you should buy.

Overall Take

In our analysis of 62 expert reviews, the Intocircuit Intocircuit Portable External Charger placed 7th when we looked at the top 9 products in the category. For the full ranking, see below.

Editor's Note May 21, 2019:
Checkout The Best Portable Charger for a detailed review of all the top portable chargers.

Expert Summarized Score
8.3
9 expert reviews
User Summarized Score
7.6
625 user reviews
Our Favorite Video Reviews
What experts liked
Massive battery 15,000 mah and even an LCD flashlight for a nice price
- BestReviews
The Intocircuit charger has an impressive build and feels very sturdy with aluminum exterior.
- Tech Walls
August 24, 2015 | Full review
Another nice feature is the LCD screen. Unlike some other chargers, which use a series of LED lights to give you a rough estimate of how much juice is left, this display is much more precise.
- Heavy
Another great thing about the Power Castle's dual USB ports is that it charges two devices at once just as fast as it charges a single device at any given time. This means that these two USB charging ports are indeed rated to provide an equal output of 2.4A of current for super quick charging.
- Gadget Mac
This battery pack provides two USB ports, both of which are capable of charging any modern device at a decent clip with up to 2.4A of power draw per port.
- Jeff Geerling
May 28, 2015 | Full review
The Intocircuit also has a nice blue LCD screen that shows power level, charging and discharging status.
- IT Pro Today
April 3, 2015 | Full review
What I discovered after having done this, is that it's best to know how to most effectively use this product. For example, there are two USB ports, one of which is better for Android charging (the 1.0A is dedicated).
- Ginae Reviews
June 16, 2019 | Full review
I found the LED indicating the amount of energy remaining to be very useful in helping me decide when to recharge the power bank since high power drawing devices such as tablets that require more juice for a full charge.
- Calculated Traveller
April 2, 2015 | Full review
Another major differentiator from other power banks is that on top is a small backlit LCD screen that reports remaining battery percentage and output status.
- Droid Horizon
June 18, 2015 | Full review
What experts didn't like
Only 2 USB ports, and the unit does not take quite some time to charge the internal battery.
- BestReviews
Unfortunately, when I tested the charger again last week. The battery level dropped to 0% and all my efforts to charge the power bank failed. I tried to charge it again with different cables and wall chargers but it couldn’t hold the charge at all.
- Tech Walls
August 24, 2015 | Full review
Limited to 500 or so recharge cycles over a lifetime.
- Heavy
But that's not to say that this battery is poorly built and made. Because it really isn't. Now it's not impressively put together, nor does it feel premium by any means.
- Gadget Mac
It takes a very long time to charge the unit itself; even if you have a 2A+ wall wart to charge the unit, it will take many, many hours to go from 0% to 100%. Typically not a huge deal, but when I'm on longer trips, I don't always have a full day I can let the unit sit and charge somewhere.
- Jeff Geerling
May 28, 2015 | Full review
The Intocircuit is heavy and dense. If you're like me, and love to travel light, this might be too heavy for you. 14.08 ounces isn't exactly dumbbell heavy, but it is heftier than most like it.
- IT Pro Today
April 3, 2015 | Full review
This unit is also slightly heavier than its competition.
- Ginae Reviews
June 16, 2019 | Full review
The only small issue is that this device is not provided with an AC adapter to recharge the power bank.
- Calculated Traveller
April 2, 2015 | Full review
The Power Castle is currently priced isn’t cheap in the world of power banks.
- Droid Horizon
June 18, 2015 | Full review

From The Manufacturer

Intocircuit Portable External Charger for Phone.

Overall Product Rankings

1. ZMI USB PD Backup Battery
Overall Score: 9.4
Expert Reviews: 6
2. Anker PowerCore+ Portable Charger
Overall Score: 8.8
Expert Reviews: 5
3. Jackery Supercharge Portable Charger
Overall Score: 8.6
Expert Reviews: 3
4. Jackery Portable Charger Bar
Overall Score: 8.5
Expert Reviews: 6
5. RAVPower 10000mAh Portable Charger
Overall Score: 8.4
Expert Reviews: 3
6. AUKEY Power Delivery Power Bank
Overall Score: 8.3
Expert Reviews: 4
7. Intocircuit Portable External Charger
Overall Score: 8.0
Expert Reviews: 9
8. Anker PowerCore+ Mini Portable Charger
Overall Score: 8.0
Expert Reviews: 11
9. RAVPower Portable Charger
Overall Score: 7.3
Expert Reviews: 3

An Overview On Portable Chargers

There’s no shortage of portable chargers available. In fact, once you start shopping, you’ll likely immediately be aware of the vast array of products out there. But although portable chargers may look alike, some even promising very similar specifications, there are notable differences from one product to the next.

One of the biggest features to look at when shopping for a portable charger is how long it will take to charge your devices. This is especially important if you have a device with fast-charging capabilities since not all portable chargers support that. A device that can fully charge multiple items at once in a limited amount of time may be well worth paying extra or sacrificing other features, such as portability.

Another feature that sets some newer chargers apart from others is the ability to charge more than just a smartphone or tablet. Some of these devices can charge a laptop or gaming console, making them useful if you’re regularly out and about with these items. You’ll also find some chargers can plug into your computer and act as a hub, charging multiple devices at once while you’re working.

While all portable chargers are designed to tuck into backpacks and laptop bags, some are even more powerful. If it’s important to be able to slip your charger into a pocket or handbag, look for much smaller devices. Some are only slightly larger than a tube of lipstick, making them especially portable, but you may sacrifice power and charging capabilities for that convenience.

While you’re waiting for your devices to charge, you may occasionally want to check in on status. Some chargers have indicator lights that show you exactly where you are in the process, giving you a general idea of the time you have left. However, if you’re only charging smartphones and laptops, you’ll likely be able to get this same information by looking at the device itself.

DYWM Fun Fact

USB-C is poised to revolutionize the way devices are charged. Instead of having multiple ports on a device for all the different cables you need, with a USB-C, you can use the same port as both an input and an output. This can be seen on newer equipment like MacBooks. You can either plug your power cord or your USB charging cord into any of the ports provided, aside from the headphone jack, but even that is changing. Some phones replace the headphone jack with a USB-C port, although you’ll still find the traditional 3.5mm headphone jack on laptops. The goal with USB-C is not only to streamline the ports that devices need to have but also to provide a single standard that will make life easier for everyone.

The Portable Charger Buying Guide

  • A good portable charger starts with its power. The Anker PowerCore+ Portable Charger and Jackery Supercharge Portable Charger pack the biggest punches, with 26800mAh of power each. You’ll still get impressive power in the ZMI USB PD Backup Battery, which has 20000mAh capacity. The much smaller Anker PowerCore+ Mini Portable Charger lags behind, with only 3350mAh.
  • The time it takes to charge is a top consideration. Although this can vary depending on the capacity of each device you’re charging,  the Anker PowerCore+ Portable Charger generally excels at this, with the ability to charge three devices at once at a lightning-fast speed.
  • Before you can charge other items, you’ll need to charge the portable charging device. The Anker PowerCore+ Portable Charger can charge faster than other power banks, reaching full capacity in about 6.5 hours. The Anker PowerCore+ Mini Portable Charger also falls behind in this area, taking approximately three hours to fully recharge after depletion.
  • One factor determining how quickly your portable charger can get results is whether or not it supports the new fast-charging capabilities built into many modern devices. The ZMI USB PD Backup Battery stands out from the pack here, supporting all the current protocols, including USB PD 2.0, QC 3.0 and BC 1.2. The Anker PowerCore+ Portable Charger can’t compete in this area, lacking the ability to charge devices like the iPhone X or iPhone 8 at the fastest available speed.
  • New charging technologies built into devices like laptops and gaming consoles make it easier to build portable chargers for them. The ZMI USB PD Backup Battery can not only charge your smartphone but it also capably charges the newer MacBooks that have Thunderbolt ports, as well as being able to charge the Nintendo Switch at the fastest possible rate in handheld mode. The Jackery Supercharge Portable Charger can also charge both MacBooks and Nintendo Switch consoles. The Anker PowerCore+ Mini Portable Charger is very limited in what it can charge, lacking the power necessary to handle most tablets. You’ll also find it can’t charge the latest Android phones, which have higher-capacity batteries.
  • One of the best things about the ZMI USB PD Backup Battery is its ability to serve as a hub. Simply plug it into a computer’s USB-C port, then plug your items into the two USB-A ports to charge while you work.
  • If you’re concerned about portability, look closely at the weight and size of the devices you’re considering. The Anker PowerCore+ Mini Portable Charger is among the lightest portable chargers you’ll find, weighing only 2.8 ounces. Compare this to the 15.16 ounces you’ll get with the Jackery Supercharge Portable Charger, and you can see the difference. Both the ZMI USB PD Backup Battery and Anker PowerCore+ Portable Charger are on the higher end of weight, at 14.25 and 13.5 ounces respectively.
  • The Anker PowerCore+ Mini Portable Charger is also far easier to slip into a pocket, measuring only 3.5 inches long and 0.9 inches thick. The ZMI USB PD Backup Battery, Anker PowerCore+ Portable Charger and Jackery Supercharge Portable Charger all have longer, slimmer profiles, similar in shape to a smartphone. They each measure around 6 inches by 3 inches, meaning they’ll still easily slip into a laptop bag or purse, but they may not be quite as easy to carry around all day with you.
  • Portability comes at a price, however. With the Anker PowerCore+ Mini Portable Charger, you can charge only one device at a time. The Anker PowerCore+ Portable Charger, on the other hand, has three powerful output ports. With the ZMI USB PD Backup Battery, you also get three charging ports. That includes a USB-C input and output port, which means you can either use it to charge a device or accept a charge. The Jackery Supercharge Portable Charger has only two ports, a USB-C and a USB-A.