An airbed pump can be the singular most labour-saving camping gadget there is! In an ideal world there is a power supply right next to your tent, enabling you to effortlessly inflate your air mattress. A 12 volt pump just plugs into your car's cigar lighter socket and does the hard work for you.
Sometimes however there is no convenient power point, or the car may be parked some distance from your pitch. It's possible to inflate your camping mattress then carry it to your tent but over a few days most airbeds, even the best quality ones, need a top-up. This is when a manual pump can be extremely handy - even if it's not your maiin pump for inflating from scratch - re-inflating an airbed without the need to pull everything out of your tent.
When camping further off the beaten track a battery powered or rechargeable cordless pump is a great choice - operating away from a power source with the same ease as a normal power pump.