Coleman 4D Universal Quick Pump

I don't understand so many low reviews for this product. I've had two of them for years now and they work perfect. Fills up my double size air mattress in just a few minutes. Batteries last a long time.

This unit gets two stars for compactness and relative ease of use. However, these benefits are of little avail when the unit is so power hungry that all but the most powerful, brand new and expensive batteries will keep the unit going for more than a few minutes. I installed some brand-new alkaline batteries (not Duracell, but not junk either at $6 for the required four D's) and set out to inflate my Coleman air bed. Before the bed was fully inflated, the unit began to puff and wheeze and emit an ungodly shrieking noise, ultimately dying out on me and leaving the bed 3/4 inflated. I installed some brand-new Energizers and the pump came back to life, but even these began to drain before long.
The bottom line is that the power demands of this pump will leave you spending a king's ransom on batteries. Only fresh Duracells or Energizers will do the job, and even they won't last for long (and there is no AC adapter to give your wallet a rest when a plug outlet is available!).
Spend the extra $10-15 on Coleman's rechargeable model, which has been very well-reviewed here on Amazon. The money you save on batteries will pay for the better unit many times over.

This pump works alright. It is pretty fast for as small as it is. It is a great alternative to hand pumping the mattress up. I however agree with others that it does not make the mattress firm enough. It seems to get to a certain point and it stops filling the mattress. Im not sure if its a safety factor so you dont over fill it... but after using this pump, it still needs to be filled up more manually. If I used it more frequently I would invest in a better, more expensive pump.

This pump came with our Coleman mattress. During the first attempt to pump up that matress during a typical Texan day in May of 97 degrees, the pump literally liquified. After the mattress was almost completely inflated the pump melted around the motor. The damage was not reversable after letting it cool down. The fly wheel did not attach do the motor anymore. The thing became instant trash.

perfect for camping away from it all and having to use it for two weeks on one set of batteries.