Will it charge just one 12 volt battery
881721
No you cannot. This one will, Battery Tender 022-0157-1 Waterproof 12 Volt Power Tender Plus Battery Charger
1782982
Yes, you can charge only 1 battery at a time. I do this often. I find that this charger works very well and I like it.
1458348
It appears to be designed for a single 12V lead-acid battery. Will typically provide between 3A-4.5A charging current on a moderately sunny day.
1205645
only pick one battery to hook up to ---it should give you 12volt ---if your running 4- 12volt batteries that is
2107448
Charges two 12 volt batteries at the same time. Using it for my boat trolling batteries.
69218
it depends on if you are running one or two batteries together. One you would need a 12 volt charger two you would need a 24 volt charger. If you are just charging one there are a lot of good slow charge chargers out there to pick from at good prices.
983685
All Battery chargers can charge 1 at a time. If it was made for 2 battery at a time consumers will be in trouble because if one battery is defective the charger will do you no good.
2112134
I have this on a 6 volt battery and it does keep it charged. I would probably go with the larger one for 12v as this said for 6 volt
1940529
If you feed this charger with 12 VDC it will surely charge your batteries.Usually 12 VDC are provided with a wall transformer 110 / 220 VAC.
546270
No, this a battery charger that can charge one battery at a time while the other battery is in use.
1510325
You would have to put 4 batteries in series and all would have to be in about the same condition--not an optimal method. you would be better off putting two 6 volt batteries in series on a 12V charger
1721620
There is only one 12 volt output. Even without connecting a charger, if you connect two batteries they will try to cross charge until they are equal output voltage. So long as that doesn't over heat the cables then the batteries are near equal voltage. With the two in parralel, you can connect the 12 volt charger to one battery and they will both charge no problem. The other option is to charge one battery from the 12 volt output and the other battery with a regular battery charger connected to the 110V outlet.
923843
you can only charge 2 12volt batterys. cant charge them wired in series that gives 24 volts. cant charge 3 batteries.
1797683
This charger can accommodate two 12v battery's, 24v total. Sounds like all you need is a single 12v charger.
2132178
yes. and will only work with one battery at a time.. so before it switches one needs to drain..
1716052
Yes, As long as both batteries are 12volt then this should work for charging and maintaining them.
933674
You need to buy a 12 regulator they sell for solar panels so it will not over charge your 12 volt batteries.