can a 12v lawn mower sealed battery be charged with 12v battery charger use on cars
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no, if you charge 9 volt battery with 12 volt battery you will destroy 9 volt battery
No. The charger for a car battery has an output measured in amps. You have an output measured in milliamps. There are 1000 milliamps to 1 amp. Way too small.
Yes, but you cannot leave it for long periods of time or the battery will overheat and boil acid away. Normally a fully dead battery to a full battery should take about 2 hours to charge up at 40 amps.
All the light bulbs in your house are in parallel across the power line.All the devices plugged into a power strip are in parallel.Everything in your car that gets power from the 12V battery is in parallel.etc.
Only if clean rainwater or distilled, and even then not very much. Just enough to cover plates, and charge immediately on long 2 amp charge.