Battery charger confusion

[MParr]

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[slomo]

So

So will a discharged battery still read 12.0 volts on the new chargers?

12.0 needs charged. 12.6 is fully charged with no surface charge on it.

 

[Firespooks]

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

With any battery, it is best to use slow charge at a low amp setting. This reduces overheating the battery. I learned this from an Interstate Battery class.

 

[Gord Baker]

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

 

[grumpyunk]

The 2A setting is for motorcycle batteries and those of similar capacity. If you charge a small battery at a higher rate it will make the battery temperature rise.
Many new batteries that are shipped w/o electrolyte will have instructions to charge around 2A.
My OLD Sears charger has 8A/2A setting, with the lower rating variable using a knob to dial in the rate you want. It was sold by Sears as an Auto/Motorcycle battery charger.
Charging any size battery at the fastest rate possible is not good for the longevity of the battery. Those who say different should read up a bit IMO.
tom

 

[Matergrower]

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

I have one, Use 50a for starting and 10 for charging. 2 amp is for trickle charging.

 

[ILENGINE]

The 2A setting is for motorcycle batteries and those of similar capacity. If you charge a small battery at a higher rate it will make the battery temperature rise.
Many new batteries that are shipped w/o electrolyte will have instructions to charge around 2A.
My OLD Sears charger has 8A/2A setting, with the lower rating variable using a knob to dial in the rate you want. It was sold by Sears as an Auto/Motorcycle battery charger.
Charging any size battery at the fastest rate possible is not good for the longevity of the battery. Those who say different should read up a bit IMO.
tom

What always get me is they say to connect motorcycle and atv batteries to a 1.5-2 amp charger for charging and then you drop that same battery into your atv and connect it to the 20 amp charging system. The same with lawnmower batteries. And just because you connect that battery to a 20 amp charger doesn't mean the battery will except or the charger will put that full amperage into the battery. The old manual chargers would deliver the full amperage, but the automatic chargers used today will vary the output depending on level of charge.

 

[cliffeby]

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

To bring it up to charge, use the 10A setting. To maintain for a month or more of non-use, use the 2A setting.

 

[Freddie21]

As they indicated, 2amp is best for the battery. 10amp if you need it quick.

 

[ILENGINE]

The 2A setting is for motorcycle batteries and those of similar capacity. If you charge a small battery at a higher rate it will make the battery temperature rise.
Many new batteries that are shipped w/o electrolyte will have instructions to charge around 2A.
My OLD Sears charger has 8A/2A setting, with the lower rating variable using a knob to dial in the rate you want. It was sold by Sears as an Auto/Motorcycle battery charger.
Charging any size battery at the fastest rate possible is not good for the longevity of the battery. Those who say different should read up a bit IMO.
tom

What always get me is they say to connect motorcycle and atv batteries to a 1.5-2 amp charger for charging and then you drop that same battery into your atv and connect it to the 20 amp charging system. The same with lawnmower batteries. And just because you connect that battery to a 20 amp charger doesn't mean the battery will except or the charger will put that full amperage into the battery. The old manual chargers would deliver the full amperage, but the automatic chargers used today will vary the output depending on level of charge.