The convenience of the Iniu 20000 PD makes it one of our go-tos for times when we need to power multiple devices or when we’ll be away from wall power for an extended period. It charges pretty dang fast for how large it is (about six hours with a USB-C cable and a quick charge block), and it can charge a smartphone to 50% in just 30 minutes. The large digital display also makes it easy to see exactly how much juice you have left instead of having to guess at what indicator dots might mean. The Iniu 20000 is a bit bulkier and heavier than many other batteries, but we think it’s worth the carry if you tend to need a lot of power for things like mapping apps and photography.

The Iniu Megapower 10000 is an affordable power bank that will provide the average smartphone with 2-2.5 charges. This mid-capacity power bank is lightweight, compact, and it can charge multiple devices at once. It takes slightly longer to charge than other batteries with the same capacity, so it may not be the most efficient choice for thru-hikers who need a quick turnaround in town. But if you’re looking for an affordable battery with a good balance of weight to power, the Megapower 10,000 is hard to beat.

The Nitecore NB 10000 (Gen 2) is a great choice for those whose priority is keeping weight and bulk to a minimum. It’s smaller than most other 10,000 mAh batteries and it’s the lightest medium-capacity power bank on our list. The sleek carbon fiber housing makes this battery both lightweight and durable – two attributes hikers will surely appreciate. The one gripe we have with the NB 10000 is that the battery life indicator isn’t very clear, but this isn’t a huge deal once you get a feel for how this battery works with your devices. The NB 10000 is a little on the pricey side, but the short recharge time, low weight, and compact size make this an ideal battery for longer backpacking trips.

The Charmast 26800 is the largest capacity battery on our list, and at its typical sale price of around $40, it’s also one of the best deals. This massive power bank can charge a modern smartphone around six times, and it also has an output high enough to power larger devices such as a tablet or laptop. Oh, and did we mention it can charge an impressive four devices at once? While the Charmast 26800 is a bit heavier and bulkier than the batteries we typically like to backpack with, it’s perfect for travel or for hiking trips where photography is a focus and you’ll need a way to power camera batteries or other larger electronics.

The Okzu 10000 is a killer deal – it’s the most affordable power bank on our list, yet its specs are on par with more expensive batteries. It’s lightweight, it recharges quickly, and it has quick charge output, but it can only charge one device at a time. This may not matter if your charging needs are simple, but you may want to consider paying a little more for a power bank with dual charging if you want the ability to charge multiple electronics simultaneously. That said, the OKZU 10000 is an awesome value, and you could even carry two of them for less money and weight than most 20000 mAh chargers.

If keeping your battery as compact as possible is your main priority, the Charmast 10000 Mini is your guy. This battery is smaller than a standard deck of cards – that’s nearly half the size of other batteries with the same charging capacity. Despite the tiny package, the Charmast 10000 still has the features of full-size batteries – like quick charge compatibility and multiple device charging. In our testing, we did find this bank to be slightly less efficient than some others – meaning a bit more of the 10,000 mAh capacity is lost between the bank itself and the device being charged. That said, this pocket-size battery will still give around two full charges for a modern smartphone.

We’ve been using Goal Zero power banks for many years now, and we love them for their low weight and compact size. The Flip 24is a tiny power bank that will fit in any pocket, and it’s perfect for outings close to home when you only need a little extra power. This battery will only charge a smartphone once or twice, so we typically use it for day hikes or as an emergency charger. If you need more juice, the Flip charger also comes in a 36 (about three charges) size. But we would recommend going with a different power bank for longer trips since this one can be a little difficult to charge on the go.