Battery charger confusion

[jes_in_sac]

Definitely not the 50A setting which is supposedly for starting, although I've never seen one be able to start anything but a lawnmower or motorcycle sized engine. Most chargers will have an automatic charging circuit, unless it's very old and very basic. So whether you do a 10A fast charge, or a 2A slow charge, when the battery is fully charged, the charger should shut the primary charging current off charging mode and go to a maintenance mode. Under normal circumstances, the 2A low amp slow charge is best for the battery, and use the 10A fast charge if you found your battery dead or ran it down trying to get the engine running and it wouldn't start for whatever reason, and need to use the mower and give it a few minutes at fast charge to put just enough juice in it to start it up, or work on the engine again to try to get it running.

 

[RevB]

Hi, I had just bought a used battery charger and I have no clue what amp setting to put it on to charge my 12 volt lawnmower battery. The charger has 50,10, and 2 amp settings on it. What amp is best for lawn mower battery? Thanks

A typical charging rate for a lead-acid battery used in a lawnmower is 1 to 3 amps. Manufacturers recommend a charge C-rate of 0.3C, but some research suggests lead-acid batteries can be charged faster, up to 1.5C, as long as the current is managed towards full charge. A 12-volt lawnmower battery should be fully charged between 12.6 and 12.8 volts.

You should really do some research about charge rates vs capacity. Anyone who suggests 10 amps is putting you and the battery in danger from overheating and explosion.

 

[bt-77]

A typical charging rate for a lead-acid battery used in a lawnmower is 1 to 3 amps. Manufacturers recommend a charge C-rate of 0.3C, but some research suggests lead-acid batteries can be charged faster, up to 1.5C, as long as the current is managed towards full charge. A 12-volt lawnmower battery should be fully charged between 12.6 and 12.8 volts.

You should really do some research about charge rates vs capacity. Anyone who suggests 10 amps is putting you and the battery in danger from overheating and explosion.

I am doing research. That is why I asked this question so I know what is a safe amp to charge lawn mower battery on.

 

[RevB]

I am doing research. That is why I asked this question so I know what is a safe amp to charge lawn mower battery on.

Problem is.....the answers you'll get here may be way wrong. Try something like this :

BU-403: Charging Lead Acid

BU meta description needed...

batteryuniversity.com

There are other pages for different chemistries.