Operating fuel transfer pump using lift battery or boat battery (calling all electrical geeks)

[Coult45]

Bought a fuel transfer pump to make it easier to refuel the boat from 5 gallon cans. Works great, but I'd rather not burn through a ton of AA batteries. Any idea if there's a way to pull power from my lift battery to replace the power from four AA batteries (without frying the little pump electronics)?

The unit I'm using is...

Amazon.com

 

[Dave burke]

the only thing that comes to mind is use rechargeable batteries. But you'll probably need at least 8 if not 12

 

[FSH 210 Sport]

According to the Amazon page it can run two AA batteries in an emergency and four is recommended. To me that says it runs on 6 volts preferably but dan run on 3 volts DC. If it listed either watts or amps I could figure out the other.

My portable live well runs on two D batteries or I can plug in a cigareete lighter adapter and it has a male plug that goes into the aerator. When male adapter plugs in it interrupts the batteries and just runs on the cigareete cord. Obviously there is a resistor in the 12v plug to drop the voltage to approximately 3-5 volts. It would take a bit of McGivering but you could probably come up with a 12V cord that would run the pump.

Or do as @Dave burke suggests and get rechargeable batteries.

 

[zipper]

Something like this... 12V To 6V DC Step Down Power Converter 10A 60W Buck Supply Voltage Regulator | eBay

 

[Coult45]

Rechargeables are definitely the answer for someone mature and competent enough to manage them. But somehow, in spite of all the other complexities and challenges I’ve managed throughout my life, I’ve always failed at managing rechargeable batteries (with the exception of my camera!), so i try to avoid batteries completely when possible. A man’s got to know his limitations.

But that step down power converter looks like a real possibility. I’ll report back on my success or failure…

And thanks for the input!