Best portable smartphone battery: juice up your phone on the go

Avoid the dreaded low battery notification with our list of the best portable smartphone batteries

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Phones are no longer capable of the week long battery charge of the olden days, but then the amount of processing power they output has jumped up just a notch or several, too. Whether it’s obsessively playing the latest equivalent of Flappy Bird, browsing the internet or just keeping your location finder on, your phone is using its juice up constantly, so it’s to no surprise that some phones struggle to last a day on a single charge.

All is not lost, though. Tech designers were hot on finding a solution to inconveniently dying phones and quickly developed compatible power banks which hold a boost of charge for those emergency situations  There is now a mass market full of them, so we’re here to help you pick the right one.

The most considerable factor to consider is the mAh - simply put, it’s how much charge your portable smartphone charger can hold. For example, the iPhone 8 battery holds 1821 mAh of charge and the average portable smartphone charger will hold 10,000 mAh of power. That means you can roughly charge your phone five times, or charge up to five devices on one single charge.

The second techy feature you should look out for is how many USB ports it has. If you’re only buying for you, then one is perfectly fine. If you’re buying for your family, you may want to consider buying one with up to three charging ports so everyone can keep their phone topped up with juice.

While not the most important feature, it’s worth looking at the style of it too. Portable smartphone batteries come in variable sizes, and while some are sleek in appearance, others are more practical, so the choice is entirely up to you.

When looking for portable smartphone batteries, it’s worth heading over the Amazon for the best picks for a reasonable price- we’ve compiled a list of the best below.

Best portable smartphone batteries 2018

Portable smartphone battery

1. AUKEY Power Bank 20000mAh Portable Charger

With a hefty charge capacity and practical design, this one makes the top of our list

Specifications
Best for: Fast charging
mAh: 20,000
Size: 17cmx11.5cmx3.5cm
USB ports: Two
Reasons to buy
+Large power capacity+Two USB ports
Reasons to avoid
-Bulky design

Featuring a full 20,000 mAh power capacity and two USB ports so you can charge two devices at the same time, this is a practical portable smartphone charger for juicing up not once, not twice, but multiple times. With a light to show you how much battery charge is left over, you can keep the device itself charged up so you’re never caught short. If you’re willing to compromise on its blocky design, you’ll probably find that this portable smartphone battery serves you well.  

Portable smartphone battery

2. RAVPower 22,000mAh power bank

Be the go-to person when low power strikes

Specifications
Best for: Group charging
mAh: 22,000
Size: 16.5cmx7cmx2.4cm
USB ports: Three
Reasons to buy
+Smaller than the AUKEY+Three ports instead of two
Reasons to avoid
-Weightier

The star of the show is its three USB ports, which means you can charge your device and two of your mates’ phones at the same time. With a hefty 22,000 mAh of power, there’s plenty of juice to go around, with experts claiming you can charge both an iPhone and an iPad up fully from 0%. With its slightly smaller design, it’s probably more convenient to carry around, and with the blue lights telling you how much power is left on the device, you know when it’s time to juice up. 

Portable smartphone battery

3. Anker PowerCore 20,100 power bank

A high speed portable smartphone charger for quick top ups

Specifications
Best for: Fast charging
mAh: 20,100
Size: 16.5cmx5.8cmx2.2cm
USB ports: Two
Reasons to buy
+High speed charging+Hefty power capacity
Reasons to avoid
-Doesn’t support Qualcomm Quick Charge

Providing your devices use PowerIQ or VoltageBoost, you’ll be able to benefit from some pretty speedy charging action - if it doesn’t, don’t worry, you can still use it, charging will just be at the usual steady pace. The smallest of our large power capacity portable smartphone batteries, it’s convenient to even slip it into your pocket if necessary. With 20,100 mAh of charge, you won’t need to worry about showing it its own charging cable until you’ve charged up your phone at least nice times - pretty good going. 

Portable smartphone battery

4. RAVPower 6,700mAh portable charger

Borrowing the old iPod Nano colours, this is one funky portable charger

Specifications
Best for: Emergency top ups
mAh: 6,700
Size: 8.9cmx4.2cmx2.2cm
USB ports: One
Reasons to buy
+Fancy colour options+Pocket-sized design
Reasons to avoid
-Smallest charge capacity on the list 

If you’re looking for a funky, convenient way to top up your phone when battery levels are looking on the small side, then this is the pick for you. While it doesn’t hold as much charge as the other devices on our list, the colours are distinct enough for you not to lose it (or to spot it from across the room if one of your work colleagues happens to nick it). Despite its compact size, it still features LED lights to show how much charge is left on the device . 

Portable smartphone battery

5. Poweradd Pilot 2GS 10,000mAh

A slim, stylish portable smartphone charger with an attractive price tag

Specifications
Best for: Budget
mAh: 10,000
Size: 17cmx10cmx2cm
USB ports: Two
Reasons to buy
+Sleek and stylish+Holds a fair amount of power
Reasons to avoid
- Slim, but still bulky in size 

It’s slim design makes it the ideal buy for slipping into a packed pocket or even the back of your jeans, and with 10,000 mAh charge capacity it certainly won’t do your smartphone an injustice, either. With an RRP of £13.99, it’s one of the cheapest portable smartphone batteries on the market, but you’ll probably find they can justify that price-tag because it doesn’t come with a cable.  Still not bad for the money, though. 

Portable smartphone battery

6. Anker PowerCore II 10,000mAh power bank

Our third pick’s little brother is ideal for slipping in a pocket

Specifications
Best for: Convenient to carry
mAh: 10,000
Size: 13.7cmx6.6cmx1.5cm
USB ports: One
Reasons to buy
+Convenient size+Super slim
Reasons to avoid
- Doesn’t come with cables 

Looking at the measurements of this portable smartphone charger, this is the most convenient to carry in our list. While it has a lower mAh than it’s older brother, and it only offers up one USB port, rather than two, for convenience sake, it’s still a pretty good buy. While fairly expensive for the amount of charge it holds, it does come with Anker’s fast charging technology, which should mean you’re not waiting around for long. 

Portable smartphone battery

7. CHJGD UltraCompact Power Bank

Stand out from the crowd with this compact power bank

Specifications
Best for: Compact size
mAh: 10,000
Size: 9.3cmx6.3cmx1.9cm
USB ports: One
Reasons to buy
+Smallest of the lot+Plenty of design graphics to choose from
Reasons to avoid
-Quite weighty

With seven unique designs to choose from, including Ferrari and American Rose, this is a portable smartphone charger for those looking to stand out from the crowd. While compact in size, users comment that it’s weightier than what they expected. With a 10,000 mAh power capacity and boasting high speed charging technology, this is an ideal all-rounder if you don’t mind purchasing from a relatively unknown brand.