Power draw on battery while using

[TWNW]

I have a 2008 ranger Z520 with 250 Pro XS.

The last couple years the power draw while on the water has gotten worse. By end of day, my battery is down to 11.9-11.7. Most Recently had a dead battery by noon in a tournament while using livewells.


My setup is brand new X2 AGM battery, helix 10 graphs, livewell pumps running. When I turn the livewells on, my voltage goes from 12.2 to 12.0 then decreases more as day goes on. I have new pumps coming tomorrow.

I’m know a little bit about basic stuff but I’m not a mechanic nor electrician. It appears that the 250Pro XS has about 1-1.5 amp draw when motor is off and the ranger battery charger has a bit of a draw on the battery as well when on the water. I use a multimeter, pulled all the wires and fuse box apart but couldn’t detect a single issue when doing that.

I am wondering if anyone else has had an issue like this? Any insight on where to look or link to how to trouble shoot the issue better? I will take it into the boat shop next week but just wondering if a loose wire or something I can check easily could be the issue.

thanks in advance

[I fish 4 Bass]

That battery should be good for what you have listed. You did not mention reserve capacity or size of battery though. Did you turn lights off after sunrise? Verify no compartment lights are on? Anything else (hydrowave, poles, etc.)?

[TWNW]

I have the group 31 X2 with 100ah. All lights were off, no hydro wave, no poles, no 360 or anything else.

only items on were livewells on auto Timer set to L, helix 10 at bow and console.

[1BADAIR]

What charger? Many have had issues with the dual pro charging agm

[TWNW]

It’s a dual pro charger, I read that as well and checked the voltage after a fresh charge it is 12.8 volts but not sure if it can be a lower AH from the charger. The Battery tested good at battery’s plus this week when I took it back to have them test it.

has me stumped for sure

[1BADAIR]

Next charge hook up a meter and watch the voltage while charging. Most AGM specify they should never go above 14.4 during a charge . My dual pro would go almost to 15volts

[TWNW]

Badair, you are correct, I have 15 volts from my dual pro charging my AGM. Now I need to see what that does to an AGM battery.

[CatFan]

12.2V is pretty well dead for that battery.

I’d suggest you look at the outboard charging system.

[dean c]

If that’s the stock charger that came with the boat…it will not charge AGM properly. I ruined a couple platinum Diehards before I figured it out.

[TWNW]

Dean, what would the stock charger do to your batteries? The last couple AGM batteries I have had on this charger do ok for about a year then they are dead after about 6 hrs of fishing. Voltage tests good but the battery life doesn’t allow to fish all day. Same thing you had issues with?

[skywayvett]

What charger is recommended to charge them?

[1BADAIR]

I switched to the minnkota cause mine would last all day even with a new agm. Didn’t have any more problems. Just switched again to a PCL cause I went to lithium

[skywayvett]

thanks

[dean c]

Dean, what would the stock charger do to your batteries? The last couple AGM batteries I have had on this charger do ok for about a year then they are dead after about 6 hrs of fishing. Voltage tests good but the battery life doesn’t allow to fish all day. Same thing you had issues with?

Exactly what mine did…degrade the battery over about a year. Always showed green lights but the battery would not last a tourney day. Switching to a minn kota digital charger with AGM capability.

[AML Survivor]

I am having a similar issue. '09 Z-21, same motor and battery charger. A couple years old Odyssey 31 AGM battery (PC-2150). Voltage alarm starts goes off midway through the day when trimming up or down. Mechanic says alternator is good. Maybe the battery charger is the source of the problem.

Thanks Dean C and 1BADAIR.

[TWNW]

Well shoot! If this is the case, I have ruined about 3 AGM battery’s. Before I bought my first AGM, I called dual pro to ask if my charger will work for AGM, they said Dual pro is compatible with all AGM battery’s.

[skywayvett]

Going to be a lot of used dual pro up for sale soon as soon as i find one my up for sale.

[1BADAIR]

Going to be a lot of used dual pro up for sale soon as soon as i find one my up for sale.

how far are you from michigan?

[dean c]

Well shoot! If this is the case, I have ruined about 3 AGM battery’s. Before I bought my first AGM, I called dual pro to ask if my charger will work for AGM, they said Dual pro is compatible with all AGM battery’s.

They didn’t lie to you…it will charge the battery…actually over charge I suspect.

https://ccar-greenlink.org/agm-batte...onal-chargers/


AGM batteries are sealed and are non-spillable, meaning that they can be mounted in non-traditional locations (i.e. somewhere other than under the hood) and in non-traditional angles (i.e. not always completely horizontal). They are vibration-resistant, so in addition to finding them in vehicles they are also found in some motorcycles, ATV’s, and in many marine applications (note; do not confuse AGM’s with gel-cell batteries, which are different). So if AGM’s don’t have the leak hazard that traditional lead-acid batteries do, what are the dangers?
Because they are sealed units, AGM’s are inherently vulnerable to being overcharged. Conventional lead-acid battery chargers oftentimes have outputs of 16 to 18 volts – well above the 14.4 volt maximum stipulated for the AGM design. So what’s the worst-case scenario here?
Using a conventional battery charger on an AGM battery could cause severe damage to the electrolytes and premature failure to the battery. Conventional chargers also have the potential to cause an AGM battery to literally explode – a hazard that we never (ever) want to expose to our technicians.
Traditional lead-acid batteries and these new AGM batteries are oftentimes very similar in their outward appearance. Before connecting a conventional charger to a battery in a vehicle (in particular if it is located away from the engine compartment) – see if it is labeled “non-spillable”. If so, only use chargers that are designed for AGM (and/or gel-cell) batteries.
More information on this topic can be obtained at: http://batteryuniversity.com/learn/a..._glass_mat_agm