Kayak Fishing Adventures on Big Water’s Edge - View Single Post

dmr · 05-31-2007, 04:48 PM

John,

Check your manual to see if it lists the power draw, something in amps (A) or mA. At 1 amp draw your 7 amp-hr bat should last around 7 hours, a 2 amp draw, 3.5 hours. As mentioned before, you can also measure the current draw directly with a multimeter. You definitely should not have to lug around a jetski battery.

I have a smaller color lowrance unit with GPS and it runs 6+ runs off 10 AA nimh batteries. The batteries are something like 2.4 or 2.7 amp-hr.

Your FF is either malfunctioning and drawing too much power, your charger is killing the battery, or the battery is getting damaged through vibration.

It is also probably worth it to get a good charger that ramps up the voltage towards the top of the cycle and then backs off to the float charge voltage when it's done.

05-31-2007, 04:48 PM	#6
dmr Senior Member Join Date: Aug 2005 Location: Carlsbad Posts: 155	John, Check your manual to see if it lists the power draw, something in amps (A) or mA. At 1 amp draw your 7 amp-hr bat should last around 7 hours, a 2 amp draw, 3.5 hours. As mentioned before, you can also measure the current draw directly with a multimeter. You definitely should not have to lug around a jetski battery. I have a smaller color lowrance unit with GPS and it runs 6+ runs off 10 AA nimh batteries. The batteries are something like 2.4 or 2.7 amp-hr. Your FF is either malfunctioning and drawing too much power, your charger is killing the battery, or the battery is getting damaged through vibration. It is also probably worth it to get a good charger that ramps up the voltage towards the top of the cycle and then backs off to the float charge voltage when it's done.