I answered this on the other forum, but again for others. It is a bit pricy, but worth every penny.
The LVM. sold at Cabela's for one and NFO. Like I said, expensive but I have had mine for over 10 years, beat the crap out of it, in fact part of it is now a harden epoxy.



I can pump up my 10 1/2' Outlaw in 1 1/2 minutes and have videoed it. Still have to top it off with 2 or 3 pumps on the double action or 5 on my K-Pump.
I use it with one of those small rechargeable batteries then I use it for my sonar.

Oh, one more thing.....it is small so very portable. Bout the size of a regular can of beer or soda.