Charging batteries

Trolling motors, Fish Finders, GPS, Batteries, anything Electrical, post it here.
the hammer
Posts: 323
Joined: 08 Mar 2007, 15:39
15
Location: Greer, SC

Charging batteries

Post by the hammer »

Okay, I charged my batteries and went fishing. All is fine.
So, should charge the batteries again after using and charge again before fishing OR just charge before fishing again?
Thanks

User avatar
Tumbleweed74
Posts: 22
Joined: 17 Sep 2021, 07:37
Location: Mitchell Wisconsin

Charging batteries

Post by Tumbleweed74 »

I always charged my batteries the night before fishing. Now I have a box with a meter, so I may just let it go until the meter says to charge. I'd like to run the battery way down the first couple of times. Don't know if that is a good thing or just an old wives tail. But that is what I do. YMMV.
1974 12' Eldo-Craft
1978 12' Rich-Line

User avatar
MN Fisher
Posts: 178
Joined: 22 Sep 2021, 09:35
Location: Mound, MN

Charging batteries

Post by MN Fisher »

My standard with the canoe was to plug in the charger the night before a trip...probably do the same with the F-9.

User avatar
InSaneFisherMan
Posts: 151
Joined: 11 Aug 2020, 14:33
1

Charging batteries

Post by InSaneFisherMan »

For lead acid batteries, it is usually recommended to charge after use to help prevent sulfation and only store with a full charge.

I charge my batteries as soon as get back from fishing/camping, when batteries are fully charged I switch to a maintenance charge.

MrGiggles
Posts: 692
Joined: 12 Jul 2017, 21:42
4
Location: Springfield, MO

Charging batteries

Post by MrGiggles »

After a trip, I will plug in the charger and unplug it in the morning once it's done. That's it. None of my electronics draw power when powered off, so discharge from sitting is very, very minimal.

Only if you let them sit for months should you need to recharge before heading out again.

User avatar
LDUBS
Posts: 3885
Joined: 14 Aug 2016, 22:25
5
Location: Clayton California

Charging batteries

Post by LDUBS »

InSaneFisherMan wrote: 27 Oct 2021, 17:00 For lead acid batteries, it is usually recommended to charge after use to help prevent sulfation and only store with a full charge.

I charge my batteries as soon as get back from fishing/camping, when batteries are fully charged I switch to a maintenance charge.

I read somewhere, probably here on TB, that is the best practice. I also plug mine in as soon as I get the boat back home.
Have Rod - Will Fish

the hammer
Posts: 323
Joined: 08 Mar 2007, 15:39
15
Location: Greer, SC

Charging batteries

Post by the hammer »

InSaneFisherMan wrote: 27 Oct 2021, 17:00 For lead acid batteries, it is usually recommended to charge after use to help prevent sulfation and only store with a full charge.

I charge my batteries as soon as get back from fishing/camping, when batteries are fully charged I switch to a maintenance charge.
I’m not running my batteries on a charger though. Mine are sitting in the boat until the next trip. I’ll charge them the day before my trip.

GYPSY400
Posts: 465
Joined: 27 Apr 2012, 21:01
10

Re: Charging batteries

Post by GYPSY400 »

LDUBS wrote:
InSaneFisherMan wrote: 27 Oct 2021, 17:00 For lead acid batteries, it is usually recommended to charge after use to help prevent sulfation and only store with a full charge.

I charge my batteries as soon as get back from fishing/camping, when batteries are fully charged I switch to a maintenance charge.

I read somewhere, probably here on TB, that is the best practice. I also plug mine in as soon as I get the boat back home.
Yes it is best practice.. sulfated batteries loose capacity and will fail sooner. Best thing to do is plug into a charger as soon as you get home, and then top up the charge before you leave next time.

Sent from my SM-A526W using Tapatalk


GYPSY400
Posts: 465
Joined: 27 Apr 2012, 21:01
10

Re: Charging batteries

Post by GYPSY400 »


the hammer wrote:
InSaneFisherMan wrote: 27 Oct 2021, 17:00 For lead acid batteries, it is usually recommended to charge after use to help prevent sulfation and only store with a full charge.

I charge my batteries as soon as get back from fishing/camping, when batteries are fully charged I switch to a maintenance charge.
I’m not running my batteries on a charger though. Mine are sitting in the boat until the next trip. I’ll charge them the day before my trip.
Why do you ask what to do if you already have your mind made up on what your going to do?

Sent from my SM-A526W using Tapatalk


the hammer
Posts: 323
Joined: 08 Mar 2007, 15:39
15
Location: Greer, SC

Charging batteries

Post by the hammer »

GYPSY400 wrote: 15 Nov 2021, 18:30
the hammer wrote:
InSaneFisherMan wrote: 27 Oct 2021, 17:00 For lead acid batteries, it is usually recommended to charge after use to help prevent sulfation and only store with a full charge.

I charge my batteries as soon as get back from fishing/camping, when batteries are fully charged I switch to a maintenance charge.
I’m not running my batteries on a charger though. Mine are sitting in the boat until the next trip. I’ll charge them the day before my trip.
Why do you ask what to do if you already have your mind made up on what your going to do?

Sent from my SM-A526W using Tapatalk

My mind wasn’t made up until I saw a couple of resonses

User avatar
JL8Jeff
Posts: 893
Joined: 26 Oct 2013, 14:56
8
Location: Ewing, NJ

Charging batteries

Post by JL8Jeff »

My boat sits in the water from late March through Oct usually. I have no electronics but the bilge pump runs when it rains and it has power trim. I will top the battery off with the charger once or twice during the season. When the boat is put away in the garage for the winter, I pull the battery out and put it in the basement with a full charge (I will typically put the charger back on it before the first use of the new season). You really shouldn't need to charge it very often since the motor will maintain the charge while it's running (but that can depend on the amount of electronics you have/use in the boat).
2001 Lowe Roughneck 1652 VT with Merc 60/45 jet 2 stroke

User avatar
InSaneFisherMan
Posts: 151
Joined: 11 Aug 2020, 14:33
1

Charging batteries

Post by InSaneFisherMan »

JL8Jeff wrote: 20 Nov 2021, 18:00 You really shouldn't need to charge it very often since the motor will maintain the charge while it's running (but that can depend on the amount of electronics you have/use in the boat).
My trolling motor doesn't charge my deep cycle battery and my DF9.9 manual says not to connect to deep cycle batteries.

Starter batteries may not need charging, but batteries used on trolling motors will need charging if used.

MrGiggles
Posts: 692
Joined: 12 Jul 2017, 21:42
4
Location: Springfield, MO

Charging batteries

Post by MrGiggles »

InSaneFisherMan wrote: 21 Nov 2021, 20:40
JL8Jeff wrote: 20 Nov 2021, 18:00 You really shouldn't need to charge it very often since the motor will maintain the charge while it's running (but that can depend on the amount of electronics you have/use in the boat).
My trolling motor doesn't charge my deep cycle battery and my DF9.9 manual says not to connect to deep cycle batteries.

Starter batteries may not need charging, but batteries used on trolling motors will need charging if used.
Yep. Especially with older two strokes that have dismal charging systems. Most are 10 amps or less running wide open. In a typical fishing scenario that doesn't amount to much at all.

Makes me appreciate my 90hp 4 stroke that has a full blown alternator, capable of putting out a decent charge even at idle.

User avatar
InSaneFisherMan
Posts: 151
Joined: 11 Aug 2020, 14:33
1

Charging batteries

Post by InSaneFisherMan »

One simple way to determine lead acid battery charge status is a DC voltmeter and status of charge chart for flooded batteries. The battery should be rested, not charged/discharged for a minimum of 15 minutes.

Checking specific gravity of each cell would be another method, but this method is very difficult when fishing.

Sealed lead acid batteries can be checked with a DC voltmeter but may require a different charge chart.

Top display is starter battery and bottom trolling motor.
You do not have the required permissions to view the files attached to this post.

User avatar
LDUBS
Posts: 3885
Joined: 14 Aug 2016, 22:25
5
Location: Clayton California

Charging batteries

Post by LDUBS »

Assuming I attached them properly, here are a couple of blogs from Minn Kota about battery charging/maintenance. Of course they promote their products, but still there might be some helpful info here related to this thread.


https://www.minnkotamotors.com/blog/art ... aintenance

https://www.minnkotamotors.com/blog/art ... le-battery
Have Rod - Will Fish