A Power Bank is an external battery inside a plastic housing. It can be charged through a laptop-type power source or a normal power charger, always using a cable with USB input. Then you can take it with you and recharge your phone or any other device whenever you need it. Learn all about How to Choose Power Bank for Camping here.
There are power bank models that can be charged with solar energy. There are also models that support water and dust with IP-67 certificate.
How to Charge a Power Bank
The Power Bank has an energy input and output. Through a USB cable, it connects the power input of the Power Bank to a power source and it will start charging immediately.

What does mAh mean?
mAh stands for Milliamps Hour and is a measuring unit used to measure electrical energy over a given period of time. It is normally used to indicate the maximum energy capacity that a battery can store at one time. A higher mAh capacity means that you can charge devices with higher power consumption and/or charge a device for a longer period of time.
Can I use a Power Bank with my Smartphone? How many mAh do I need?
You can use a Power Bank to charge your smartphone as long as you have the right cable. More mAh capacity means that more energy can be stored and therefore you can charge your smartphone longer. To charge your mobile it is recommended that you have at least 1800mAh.

Can I use a Power Bank with my tablet?
Same as the previous point. A Power Bank can be used to charge any device with a rechargeable battery, provided that it has the appropriate cable. As the mAh of a tablet is normally higher than that of a smartphone, you will need a PowerBank with more mAh (we suggest you start with about3600 mAh.)
How many times can I load a Power Bank?
In general, a Power Bank can be fully loaded and unloaded about 500 times before it starts to gradually reduce its capacity.
How to Choose Power Bank for Camping: Construction
The construction of your power bank is strongly linked to the use you will have for it. If everything you are going to use a portable charger for is to back it up in an emergency and you are going to leave it in your bag, then the construction is not going to be as vital.
If you are planning a camping trip or some other similar activity, then you will want your charger to have a higher level of construction so that it can withstand the harshest environment. Having a shockproof battery can also help prevent your charger from easily breaking if you drop it.
A power bank for camping may be better than one that can withstand water, dust and a few knocks since you will always have energy in a campsite.
