Battery charging

Belmont Resident · 03-22-2010, 05:59 PM

I was told to use only trickle charge mode when charging batteries.
Newer batteries unlike the older ones are greatly depleted when charged at a high rate or when you need to use the jump start mode.
If the charger does not have an automatic mode and or trickle mode I’d look for one that does. These usually charge only when needed and at about 2 amps.
Also keep in mind that many of the newer batteries only have a life expectancy of 3-4 years.
I just bought 2 new batteries for my plow truck and they are already on their way out.
Of course they are heavily drained when plowing with the electric plow motor, dual strobe light, plow lights, heater fan all on the power drain is excessive.

Misty Blue · 03-22-2010, 06:25 PM

What I about charging jet ski batteries is that you have to be Hudini (sp?) to get at the posts!

Also just sitting on the mooring they seem to go south unless the machine is used regularly. Just when you want to go after a couple of weeks and the engine is being slow to start it runs out of getgo.

Last year I bought a trickle charger from West. It is an automatic, won't overcharge and I think that it goes over 2 amps when needed but will not boost.

The cool part is that it is hard mounted in the boat. It was made to. Now if I'm planning to run the thing I just put it on the dock or beach and run an extention cord to it's nice little 110 volt plug.

Works great!

And yes it is a good new battery.

Now, ROBMAC: I have heard from boyhood and have witnessed that leaving a battery on a concrete floor will kill the thing. This does happen. WHY?

What is in a concrete floor that causes this to happen?

By the way, I winterize my batteries on a wooden rack with a monthly trickle charge.

Misty Blue.

ApS · 03-22-2010, 10:41 PM

Quote:

Originally Posted by Misty Blue

"...Last year I bought a trickle charger from West. It is an automatic, won't overcharge and I think that it goes over 2 amps when needed but will not boost...I have heard from boyhood and have witnessed that leaving a battery on a concrete floor will kill the thing. This does happen. WHY? What is in a concrete floor that causes this to happen?
By the way, I winterize my batteries on a wooden rack with a monthly trickle charge..."

Using a tiny trickle charger, I charged a new battery on gravel last summer and managed to evaporate all the water away!

Concrete (and maybe gravel) may act as an inductor that draws the charge from the battery through the case. As above, a wooden rack with a monthly trickle-charge seems like the better solution—but personally, I'd opt for twice-monthly.

Quote:

Originally Posted by Dave R

"...If you park a modern car for a week and then start it in sub-zero weather, it'll draw a whole lot of current after the car starts. You can hear it in the alternator, if you know what to listen for..."

I've heard it too, but I think what is heard is the added loading at the alternator belt.

______________________
To fully-develop all of one's senses is a really good thing—most often "left out" is hearing.)
—Aristotle

Or was it Martha Stewart?

Dave R · 03-22-2010, 06:37 PM

Quote:

Originally Posted by Belmont Resident

I was told to use only trickle charge mode when charging batteries.
Newer batteries unlike the older ones are greatly depleted when charged at a high rate or when you need to use the jump start mode.

I've heard the same thing, but then I think about how the charging system in a car works and realize it's got to be a myth. An alternator can easily dump 50 amps or more into a discharged battery and there's no current limiting circuitry in a car charging system (just voltage). It'll put in whatever current the battery will take, up to the output limit of the alternator. If you park a modern car for a week and then start it in sub-zero weather, it'll draw a whole lot of current after the car starts. You can hear it in the alternator, if you know what to listen for.

Airwaves · 03-22-2010, 06:52 PM

Several years ago I bought a charger at Sam's that also has a reconditioning function on it. I have not had to buy a new battery since then.

BroadHopper · 03-28-2010, 09:14 PM

Quote:

Originally Posted by Airwaves

Several years ago I bought a charger at Sam's that also has a reconditioning function on it. I have not had to buy a new battery since then.

Purchase one of those with a reconditioning microprocessor. Both batteries in the boat are 7 years old. leave it on all winter and recondition the batteries in the spring. Wiil be 8 years this summer.

I take the batteries out of the boat and store them in the cellar.

The reconditioning does work. My skidoo battery wouldn't hold a charge. Recondition it and it last all winter.

NoBozo · 03-22-2010, 08:01 PM

Quote:

Originally Posted by Dave R

I've heard the same thing, but then I think about how the charging system in a car works and realize it's got to be a myth. An alternator can easily dump 50 amps or more into a discharged battery and there's no current limiting circuitry in a car charging system (just voltage). It'll put in whatever current the battery will take, up to the output limit of the alternator. If you park a modern car for a week and then start it in sub-zero weather, it'll draw a whole lot of current after the car starts. You can hear it in the alternator, if you know what to listen for.

Bingo. Big jolt right after you start the car... and for 15 minutes or so to get the battery back to where it was before the start. A cold start in cold weather takes a big chunk out of your battery. The alternator needs to put it back fast.

NB

dog paw · 03-22-2010, 08:12 PM

Quote:

Originally Posted by Dave R

I've heard the same thing, but then I think about how the charging system in a car works and realize it's got to be a myth. An alternator can easily dump 50 amps or more into a discharged battery and there's no current limiting circuitry in a car charging system (just voltage). It'll put in whatever current the battery will take, up to the output limit of the alternator. If you park a modern car for a week and then start it in sub-zero weather, it'll draw a whole lot of current after the car starts. You can hear it in the alternator, if you know what to listen for.

Most Jet skis charge somewhere from 200 to 300 watts. and thats @ 6000rpm. Its not a myth.... You might as well use the battery for ballistic media for the ole 357 after a couple hits on the auto charger

ALWAYS trickle charge small engine batterys.

Dave we have a 1930 Model A in the shop right now that has a voltage regulator.... Most of todays autos sport well over 100amp alternators that have quite complex digital regulating systems to control charging

Dave R · 03-22-2010, 08:54 PM

Quote:

Originally Posted by dog paw

Most Jet skis charge somewhere from 200 to 300 watts. and thats @ 6000rpm. Its not a myth.... You might as well use the battery for ballistic media for the ole 357 after a couple hits on the auto charger

ALWAYS trickle charge small engine batterys.

Dave we have a 1930 Model A in the shop right now that has a voltage regulator.... Most of todays autos sport well over 100amp alternators that have quite complex digital regulating systems to control charging

200 to 300 watts at 12 volts (the voltage where the alternator is at max output current, not the 14.4 volts it'll put out when not really loaded) is 16.66 to 25 amps. That's hardly a trickle...

I don't know of any cars with current regulated alternators digital or not, but every car, motorcycle, and boat I have ever owned did not have any current regulation (except fusable links). They'll put out as much as their rated output if you put a load on them. They all have had analog voltage regulators though. None killed batteries in abnormally short amounts of time.

jrc · 03-23-2010, 07:05 AM

the concrete floor story is out of date

http://www.thebatteryterminal.com/Te...n_Concrete.htm

SIKSUKR · 03-23-2010, 08:48 AM

Quote:

Originally Posted by jrc

the concrete floor story is out of date

http://www.thebatteryterminal.com/Te...n_Concrete.htm

Very simply explained and easily understood.I have had this argument with more than a few people.Thanks for the link.

NBR · 03-28-2010, 08:27 PM

Buy a modern charger that shuts down when the battery is at full charge but comes back on when needed. I have one but the best thing I have for my fishing boat is an onboard charger that charges 2 trolling motor batteries and the cran king battery for the big motor. You can leave it plugged in all winter without damage so long as you have the proper amount of water in the battery.

03-22-2010, 05:59 PM	#1
Belmont Resident Senior Member Join Date: Apr 2004 Location: Belmont NH but prefer Jackman Maine Posts: 1,857 Thanks: 491 Thanked 410 Times in 251 Posts	automatic charger is the best way to go I was told to use only trickle charge mode when charging batteries. Newer batteries unlike the older ones are greatly depleted when charged at a high rate or when you need to use the jump start mode. If the charger does not have an automatic mode and or trickle mode I’d look for one that does. These usually charge only when needed and at about 2 amps. Also keep in mind that many of the newer batteries only have a life expectancy of 3-4 years. I just bought 2 new batteries for my plow truck and they are already on their way out. Of course they are heavily drained when plowing with the electric plow motor, dual strobe light, plow lights, heater fan all on the power drain is excessive.

03-22-2010, 06:25 PM	#2
Misty Blue Senior Member Join Date: Jul 2004 Posts: 658 Thanks: 121 Thanked 283 Times in 98 Posts	Jet ski batteries are a pain. What I about charging jet ski batteries is that you have to be Hudini (sp?) to get at the posts! Also just sitting on the mooring they seem to go south unless the machine is used regularly. Just when you want to go after a couple of weeks and the engine is being slow to start it runs out of getgo. Last year I bought a trickle charger from West. It is an automatic, won't overcharge and I think that it goes over 2 amps when needed but will not boost. The cool part is that it is hard mounted in the boat. It was made to. Now if I'm planning to run the thing I just put it on the dock or beach and run an extention cord to it's nice little 110 volt plug. Works great! And yes it is a good new battery. Now, ROBMAC: I have heard from boyhood and have witnessed that leaving a battery on a concrete floor will kill the thing. This does happen. WHY? What is in a concrete floor that causes this to happen? By the way, I winterize my batteries on a wooden rack with a monthly trickle charge. Misty Blue.

03-22-2010, 06:52 PM	#5
Airwaves Senior Member Join Date: Feb 2006 Location: I'm right here! Posts: 1,153 Thanks: 9 Thanked 102 Times in 37 Posts	Several years ago I bought a charger at Sam's that also has a reconditioning function on it. I have not had to buy a new battery since then.

03-23-2010, 07:05 AM	#10
jrc Senior Member Join Date: Apr 2004 Location: NH Posts: 2,689 Thanks: 33 Thanked 439 Times in 249 Posts	the concrete floor story is out of date http://www.thebatteryterminal.com/Te...n_Concrete.htm

The Following 3 Users Say Thank You to jrc For This Useful Post:
Misty Blue (03-23-2010), trfour (03-23-2010), Whimsey (03-27-2010)

03-28-2010, 08:27 PM	#12
NBR Senior Member Join Date: Apr 2004 Location: Bristol Posts: 119 Thanks: 0 Thanked 19 Times in 15 Posts	Buy a modern charger that shuts down when the battery is at full charge but comes back on when needed. I have one but the best thing I have for my fishing boat is an onboard charger that charges 2 trolling motor batteries and the cran king battery for the big motor. You can leave it plugged in all winter without damage so long as you have the proper amount of water in the battery.