Do portable trolling motor chargers work?

[mcump]

I am using a 40lb thrust minn Kota trolling motor on a 12ft modified V aluminum boat, will any of these actually increase the batteries life a noticeable amount? I am trying to stay away from buying a spare battery to cut down on weight.

 

[matt167]

If trailer boat. Put a breakaway box on your trailer. You can use a lead cord of sorts to charge your batteries going down the road.. the system will self regulate

 

[mcump]

If trailer boat. Put a breakaway box on your trailer. You can use a lead cord of sorts to charge your batteries going down the road.. the system will self regulate

It is not sadly, and I am looking to use these chargers on the water

 

[Starcraft5834]

buy a 2.5 hp Merc 4 Stroke gas outboard.. it weighs 30 lbs and will deliver 3x thrust

 

[roscoe]

These are just small batteries to recharge your main battery.
Yes they are smaller and lighter, but will not provide much power for you.
Possibly a NOCO GB70 would help.
But at $200 is it worth it.
A regular group 24 battery only weighs 40-45 lbs.
Most people can scrap 40# of non essential gear from their boat if weight is truly an issue.

 

[dingbat]

The two biggest killers of batteries are deep discharges and not charging them immediately after discharge.

The lifetime of a battery is directly related to the depth of the discharge that it regularly experiences.

If you subject a deep cycle battery to 80% (11.58V) DOD on a regular basis you will get roughly half the life out of your battery than if you were to cycle it to 50% (12.06V) DOD.