If AC, use a transformer. If DC, use a voltage regulator (lossy), or Pulse-Width Modulation (PWM; complicated) to limit the voltage/current.
Abc 123, 2c4 783, 56v 6vk, 88u hgy, 97h yfb, hb7 884
can a 12v lawn mower sealed battery be charged with 12v battery charger use on cars
Anything needing 12V to operate.
12v, 3.3v 5v
12v
No, you need at least 12v to charge 12v. Most alternators charge at 13-14 volts.
The battery is a 12V car battery.
YES
DC 12V power supply can convert 110/220V AC power source to 12V DC.
if you have 12v dc then you can use a 4 ohm resistor
Battery chargers have a 12v DC output.
12V 5A = 12V 5000mA