Best battery pack: We run down the top battery packs, power banks, and portable chargers that'll keep your phone powered up for longer.
Let's face it, unless you're using your phone a hell of a lot, you're unlikely to need an external battery pack. Most smartphones will give you at least a day's use as long as you're not binge-watching a series on Netflix or you're simply unable to tear yourself away from the latest mobile gaming craze.
Speaking of which, many of you are probably here because of Pokémon Go. In which case, you might be one of the few who actually does requires a battery pack.
It seems Go is somewhat of a hit, and suddenly the world faces a dilemma unlike any other in human history – how are we to keep our phones alive long enough to catch that elusive Charizard?
Luckily, there's a load of companies who make external battery packs, or power banks, or portable chargers. Whatever you want to call them, Amazon is teeming with alternative power options that should keep your handset going for aeons.
Here are some of the best...
AUKEY Quick Charge 2.0 Powerbank
Recommended by none other than our Mobile Editor Max Parker, this pack charges up very quickly and has a respectable 16,000mAh capacity – that's enough to recharge your iPhone about six times and an iPad about twice.
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What's more, as the name suggest, it also has Quick Charge 2.0 tech, which means you'll be filling your compatible Android phone with charge faster than ever before. Quick Charge-enabled phones can gain up to 75% battery in as little as 30 minutes.
You've also got the choice between using a Micro USB connection or USB Type-C, as the device comes with both cables. That means if you've got a Nexus 6P or LG G5, for example, AUKEY's power bank is a great option.
Anker PowerCore+ 20100 USB C
The Anker PowerCore+ 20100 USB-C has a huge capacity and can charge via both USB and USB-C. That adds a level of future-proofing which ensures your next smartphone will be able to make use of Anker's power bank.
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There's also an LED power wheel which gives you an indication of how much juice you've got left, and the combination of Anker's PowerIQ and VoltageBoost technologies should ensure a swift charge. The PowerCore+ is also quick to recharge itself, taking only eight hours to replenish its power. There's no Quick Charge support, however.
Looking for a versatile battery pack with a ton of charge capacity? Look no further.
Anker PowerCore 10000 Portable Charger
Another Anker entry, this more compact option comes with the added bonus of Quick Charge 3.0 support. So if you've got a phone that comes with Qualcomm's latest technology you can expect a speedy charge when using the Anker PowerCore 10000 – about 80% in 35 minutes, to be more precise.
But what else can you expect from this portable power bank? Well, the 10,000mAh capacity should be enough to charge most phones at least three times, and most tablets at least once. Which is pretty good going for such a slight device. There's also stuff like surge protection, temperature control and other safety features.
If you need something compact with a decent capacity, give this one a go.
Incipio OffGRID Express 3,000mAh Backup Battery Case
Cheaper and slimmer than a Mophie, this is a slightly different offering. This battery case will snap on to your iPhone 6 and keep your beloved Apple device chugging along for much longer with its 3,000mAh capacity. That should effectively double the phone's charge.
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The Incipio OffGRID Express also comes with a 3.5mm headphone extender cable, so you can keep the music going while the case is attached to the phone.
Easy to attach, affordable in comparison with other options, and with a sleek design, the OffGRID Express is a great option for those looking to keep their phone and battery pack as portable as possible.
RAVPower Portable Charger 22,000mAh Battery Pack
Planning a long trip? Looking for something that will keep multiple devices charged during the journey? This RAVPower portable charger is the answer. Its massive capacity should ensure that you, and you're family and friends, don't run out of juice on the go. This thing will charge your iPhone 6S up to nine times, a Galaxy S7 up to five times, or an iPad Mini more than three times.
It's also pretty affordable too. You should be able to pick up the charger for around £35, which is a great price for such a capacious power bank.
The device comes with three USB ports, so you can charge multiple phones or tablets at once, plus the iSMART 2.0 tech will minimise charging time by adjusting the current and voltage accordingly. Pretty neat!
Tronsmart Presto 12,000mAh USB-C Battery Pack
This stylish battery pack comes with a decent capacity and is another of our top power bank picks to support Quick Charge 3.0 tech. So not only can you admire the classy matte-black finish, but you can also guarantee your Quick Charge-enabled phone will be almost fully juiced up in around half an hour.
You can expect to charge your iPhone 6 about 4.5 times, your S7 about 2.5 times, and the LG G5 about three times. HTC 10 owners should get around 2.5 full charges from the Tronsmart Presto, while a Nexus 6P will get about two full recharges.
And for those whose phone uses a USB Type-C connection, you're also covered. The Tronsmart Presto comes with a Type-C port alongside the standard USB socket. It does only come with a USB-to-USB-C cable, however, so it's best suited for C adherents.
Anker PowerCore+ mini
With a 3,350mAh capacity, the Anker PowerCore+ Mini may be a small device, but it will double the capacity of most high-end handsets. The power pack recharges itself in around three to four hours and includes Anker's PowerIQ tech, which the company says allows it to detect the fastest possible charge speed for your particular phone or tablet.
Measuring just 3.7 x 0.9 x 0.9 inches, and weighing just 0.08kg, Anker's mini device is certainly a very portable offering. There's a Micro USB cable included, and the PowerCore+ Mini features an LED light to let you know how much charge is left. Handy, portable, and nicely designed – what else do you need?
Oneadaptr Flip Power
The Flip Power is the only charger here that's self-contained. There's no need for a mains adapter or USB socket to charge it up in the first place, because it has a flip-out UK mains plug built in.
In addition to that, you also get dual USB sockets and an LED indicator for battery level. The cell only has a 2,000mAh capacity, but the convenience of that plug goes quite a way to making up for it.
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Let us know in the comments if you're using a different power bank that you think deserves a spot in our list.