There is nothing worse than running out of battery on your phone. Well, there is, but when it happens it feels like the worst thing in the world.

Unfortunately, as advanced as smartphones have become in recent years, battery life is still something they haven't quite nailed. Some will last most of the day, others might get you through most of the evening too, but that's assuming you aren't spending all your time on WhatsApp, or catching Pokemon.

Doing either of those, especially the latter will see that bar in deplete. Rapidly. The problem is, while you might be thrilled at having caught Pikachu, if you've missed your last train in doing so and your battery is on 2 per cent, that thrill will quickly disappear, no matter how cute he may be.

That's where battery packs come in. They have been around for years so when it comes to your options, there are hundreds. You'll find small ones that will fit in you pocket but only give you a small bit of extra juice, as well as larger ones that will charge your phone three times over. That's a lot of extra Pokemon playing you could be doing.

We've rounded up a selection of the best battery pack options out there to make sure your phone keeps up with you. 

Click here to see the best battery packs.