For most pumps, you will need a constant supply of electricity to be able to use them, so you either plug them directly into a socket or hook them to a car battery (just like car pumps). This basically means that if you don't have an electricity supply in your sockets or a car battery handy, you might be unable to inflate what you want.
With this mini air pump, however, you won't have to worry about any of that. This is because it has a rechargeable design, so you will be able to inflate whatever you want, whenever you want. This makes it the ideal outdoor camping accessory for you!