Firstly, think about how much power you’re likely to need and how long you might be away from a power source. This will dictate what size power bank you need in terms of battery capacity, which is usually measured in milliamp hours (mAh). Many of the best power banks come with a mid-range capacity, as it's a great balance between portability and convenience.

You want a more portable option: Because of its combo nature, the Anker 733 is a bit bulky and cumbersome, but if you use it both ways, it's worth the trade-off in size to have such a useful device.To charge an external device simply plug the USB-A end of the required cable for your device into the USB-A port on the top of the PB-7800, which is next to the USB-C port. The device should begin charging automatically, but if not then press the power button on the front once. The power bank will automatically select the correct charging output for you device of either 5V, 2.4 A, 9 V 2 A or 12 V 1.5 A. Once the device is charged the power bank will automatically turn off. In fact, our testing confirms what battery makers usually claim. A battery maker will claim between 60% and 70% efficiency, so that 10,000mAh battery will only give your phone around 6,000mAh of extra battery charge, at the least. In practice we find around 65% efficiency, though occasionally we can do even better. With a IP68 rating, the NPB1 is fully dust proof and waterproof up to 2 metres depth for 30 minutes, as well as being drop resistant to 1 metre and withstands extremely low temperatures of -10°C, making it a reliable and durable power source whether you're caving, trail running or commuting.

Battery life is also more than acceptable for all but the most extreme ultrarunners, offering 40hrs on the lowest and 3hrs on maximum brightness. Tested in laboratory conditions to ANSI/PLATO FL1 standard using the built-in 5000 mAh rechargeable battery under the temperature of 21±3°C and humidity of 50% - 80%. Results may vary between torch, battery and environments. When a device is plugged in to either the USB-A or USB-C output the four LED indicators will decrease from right to left as the battery is drained. The torch can still be used while being discharged, but can only access eco, low or mid modes and the charging time will be prolonged as well as drain the battery faster. Another compact and relatively lightweight power bank with an integrated solar panel that can fully recharge its 6,000mAh internal battery in 28 hours of sunlight. However, with the Supercharger solar panel attached, charge time is reduced to around 8 hours, or 6 hours if all the solar panels are in direct sunlight. The Freeloader Sixer has a 2.1A USB output as well as integrated micro-USB and lightning cables, enabling up to three devices to be charged simultaneously. With USB-C and twin 2.4A USB outputs, the GP Batteries M-series power bank supports the latest devices and offers speedy charging. You can charge up to three devices simultaneously. The 15,000mAh capacity gives a real-world performance of about four to five smartphone charges (though the manufacturer quotes six). It’s very simple and easy to use – a single button with four LED indicator lights and device auto-detection means you can just plug in and go. It is supplied with a 2-in-1 micro-USB and USB-C cable.

WakaWaka Power+ With Solar Panel And Link

Cons: Single outlet port and limited battery capacity means this little guy reaches his limits when it comes to charging bigger devices. However, disposable batteries are not only costly (especially the lithium variety), but they will end up in landfill, which is bad for the environment. The latest trend, therefore, is towards rechargeable lithium batteries that can be recharged very conveniently using a simple micro-USB or USB-C cable attached to a power source. The torch itself may be more costly but you’ll save a heap of sterling in the long run – and help save the planet too. How much should I spend on a rechargeable LED torch? You can also charge the Anker Prime using both USB-C ports at the same time, for a combined recharging rate up to 170W. That means you can completely refill this whopping 27K mAh battery in under 40 minutes. I thankfully had an Anker 737 GaN Prime charger that was up to the task, and it's fun to see the percentage climb.

You need fast power: This is a very slow charger, whether wired or wireless, so it's better for casual charging while you sip your water and read a book. The NB20000 is airline approved with a rated capacity of less than 100 Wh, which makes it the perfect compact travel companion for charging devices on the move. King Power Banks , Pomifi Power Banks , Portronics Power Banks , Energizer Power Banks , Intex Power Banks , maximilion Power Banks , Pomics Power Banks , Syska Power Banks , Billion Power Banks , MIPLUSGADZET Power Banks , PHILIPS Power Banks , conekt Power Banks , Mi Power Banks , REDMI Power Banks , APPLE Power Banks , callmate Power Banks , Philips Power Banks , zofia Power Banks , iball Power Banks , realme Power Banks You're trying to keep it simple: The Baseus Airpow doesn't have any built in wires or wireless charging, so you'll need to carry extras when it's time to power up. The body is made from carbon fiber reinforced polymer and has a hollowed frame to give the NB20000 its lightweight design, but also provide high strength and impact resistance to protect the cell. The interwoven carbon fiber sheets stabilise the cell for safe use, and the power bank has multiple safeguards such as overcurrent, short circuit, over-discharge, over charge, over voltage and thermal protection.Thanks to its IPX7 rating, this power bank by Outdoor Tech can be submerged in 3ft of water for up to 30 minutes. That makes it well-suited to the most demanding conditions. It also has a built-in 100-lumen torch with three light settings – another useful feature for the great outdoors. The design is compact and relatively lightweight, while the 10,000mAh capacity gives you real-world performance of a little over three full smartphone charges. However, although there are two USB outlet ports, only one of these supports high-speed charging. The Kodiak Plus 2.0 does not have charge-through capability either. Pros: Slim design, simple to use and good performance. High battery capacity and competitively priced too. Cons: The integrated support stand used to position the Sixer is flimsy and snapped on test. Though marketed as impact- and water-resistant, it does not carry an IP-rating. It does have a rubberised cover to help protect against damage, but this needs to be removed to use the integrated charging cables. You only want to charge a phone: If you don't need to charge a laptop occasionally, or you only carry a phone with no accessories, the Anker 733 is more than you need.

With a IPX5 rating, the NB20000 is ready to accompany you on your adventures with rain or shine, making it a reliable and durable power source whether you're trail running, camping or commuting.

Ravpower Xtreme RP-PB41

Finally, don’t underestimate the versatility of the humble keyring torch. These titchy beamers will not only highlight the route ahead but they will illuminate your front door keyhole, provide light when the car has broken down in a country lane and guide you to the fuse box when the lights go out. Are LED torches waterproof? Anything with 20,000mAh or above will charge your phone multiple times, and many can charge several devices at the same time. As such, they're usually larger, weightier and can be more expensive.