Almost everybody owns some form of mobile device these days, whether it's a smartphone or tablet, a smartwatch or camera, a laptop or even a games console such as a Nintendo Switch. Each runs on battery power, and when that runs out users start getting frustrated. So a power bank that can keep all these gadgets going is an excellent gift - for yourself or for someone else. 

Power banks are usually reasonably affordable, though as with all consumer tech you'll find yourself paying through the nose for the top brands or fancy features. Hence we've put together our pick of the very best power bank deals available, as well as some handy buying advice tips.

We can hardly believe our eyes at this deal: a five-pack of emergency power banks for just £8.99! They won't be anything special, and at 2,000mAh are unlikely to provide a full charge for your phone, but at this price they could be an extremely handy gadget to throw in the bag and not worry too much about. They would also make great stocking fillers. 

You can find our full selection of power bank deals here.

Keep your eyes peeled for Amazon Lightning deals on power banks too.

Best Power Bank Deals

Power Bank Buying Advice

All power banks have the same primary function: to charge other devices over USB. However, you'll find a variety of designs, some with multiple USB outputs and others that include Lightning or USB-C as well as the standard USB-A and Micro-USB ports. These days you can also find power banks that charge wirelessly, recharge themselves using solar power, and have power outputs high enough for a laptop or games console.

The number and type of inputs and outputs, whether or not there's an LCD screen, and extra features such as waterproofing and passthrough charging are all down to the user. The two things you really need to watch out for are capacity and power output.

Unless otherwise specified most power banks will run at around 65% efficiency, which means only 65% of whatever is their rated capacity will be available to charge your device. So if you're looking to fully charge a 3,000mAh phone you need a 4,615mAh power bank (3000/65x100). If you want to charge it twice you need a 9,230mAh power bank.

If you want a pocketable power bank it really needs to be no higher in capacity than 10,000mAh. Around 15,000mAh is good for throwing in a bag, while anything over this is a proper chunk but good for several days' life away from mains power.

For a phone or tablet almost any power bank will suffice. Avoid slow 5W (5V/1A) outputs like the plague, especially for tablets such as the iPad, but 10W (5V/2A) and 12W (5V/2.4A) connections are now pretty common. Many power banks support Quick Charge, which is faster still, but useful only if your mobile device also supports the standard. If it does not it will still charge, but no faster than usual.

If you're looking to charge a laptop or the Nintendo Switch, know that these require more power than is provided by a standard USB connection. This can be delivered by power banks that support power delivery, which is anything up to 100W. The exact charge you need depends on your individual device - the information is not always easily available, but a good rule of thumb is to check the spec printed on the charger it was supplied with.

If you're charging a Nintendo Switch, ensure you are using a cable with a 56 OHM resistor or you risk bricking your console. The cable supplied with the Nintendo Switch will do the job.

Read next: Best power banks and Best laptop power banks

1. Anker PowerCore 13,000mAh

From: Amazon

Was: £28.99

Now: £21.74  (£7 off with code MA9W718Y)