I have built man boxes such pumps and find they are all the same what I would do is look for a pump that delivers the most l/p/m with the least amp drawn so you get the longest out of your battery. I use Vyair pumps and they are good but my backup pump in the van is two in tandem cheap pumps they deliver 12 liters per minute at 100 psi and have worked for 3 years. The only complaint is they
are noisy and vibrate a lot at full wack, were the Vyair is smooth. And if they break,just through away and replace.