The Samsung Galaxy S5 has a pretty large battery, around 2800mAh. It also has some great power-saving features, which provide some amazing standby. But that still may not be enough for the heavy user. That's where these battery packs come in. The 10 battery packs listed below are some of the more popular and better built battery packs around. They all vary in size as well.
Lenmar Helix 11,000mAh external Portable Battery Pack
The Lenmar Helix allows you to charge three devices simultaneously and has an 11,000mAh capacity. So you should be able to charge your phone at least twice, possibly three times. It also has some LED indicator, which shows you how much battery is left.
Jackery Giant 10,400mAh Premium Portable High Capacity External Battery Pack
The Jackery Giant is a 10,400mAh battery pack that comes in multiple colors, and has two USB ports which are able to charge two devices simultaneously. It also has an LED indicator to show you how much battery is left in the battery pack.
RAVPower Deluxe External Battery Charger
RAVPower has a pretty nice looking 14000mAh battery pack available for about $40. They also have a smaller one that's only 8400mAh. It has two USB ports as well and LED indicators as most of the others on this list.
Anker Astro E5 15000mAh Battery Pack
Anker is pretty famous for their battery packs. They may not have the best looking ones, but they are pretty reliable with a huge capacity. This one also has two USB ports so you can charge two devices simultaneously as well.
Limeade Blast L130X - 24000mAh External Battery pack
How about a 24,000mAh battery pack? Yes you read that right. Sure it's a bit pricey, but it is a great battery pack that will last you a pretty long time. It has two USB ports as well as a flashlight, to help you see in the dark.
Introcircuit Power Castle 11,200mAh Portable Battery pack.
This battery pack is a bit different. It actually has a display that shows you how much is left in the battery. Which is better than just have a couple LED indicators, so I think anyways. It does also have dual-USB ports so you can charge your phone and tablet together.
EasyAcc 12,000mAh Power Bank
This pretty high capacity battery pack from EasyAcc has four USB ports so you can charge plenty of devices all at once, which is a good idea. It also uses LED indicators to show you how much battery life is left.
Anker Astro Pro2 20,000mAh Battery Pack
Here we have a 20,000mAh battery pack. Now that's a massive battery pack ant it's actually under $100, surprisingly. It can even charge your HP Chromebook 11 at least one full time. It does also use LED indicators to tell you how much battery is left.
EC Technology 22,400mAh battery Pack
EC Technology has a nice-sized battery pack as well. This one is also over 20-thousand mAh's. For just $55, it can charge your phone several times, or your tablet a couple of times. It does have two USB ports as well as LED indicators.
New Trent PowerPak Ultra 14,000mAh Battery Pack
New Trent is also pretty popular for their battery packs. Here they have a nice 14,000mAh battery pack here that is waterproof and shock proof. So you can drop it without having any issues. It also has two USB ports for charging two devices simultaneously.