No
No.
No
can a 12v lawn mower sealed battery be charged with 12v battery charger use on cars
NO, voltage of the charger must match the battery voltage.
Depends on the amperage of the charger. A 10 amp charger will charge it in about 1 hour.
Yes, you can charge a 12V 7.2Ah battery with a 12V 300mA charger, but it may take a long time to fully charge the battery due to the lower current output. The charger will provide a safe voltage for the battery, but the charging time could be significantly extended compared to a charger with a higher current output. Ensure the charger is compatible with the battery chemistry to avoid any damage.
there is no problem , it's the same way to charge the battery in 12V . whatever the 50ah ,100ah ,or 60ah . the only difference is the charge time Allan Skype :Minjia002
yes
No, you need a 24 volt charger.
It is not recommended to recharge a 3V battery with a 12V charger as this may damage the battery. The voltage of the charger should match the voltage of the battery to avoid overcharging and potential safety hazards. It is best to use a charger specifically designed for the 3V battery.
Yes, the amp hour rating gives you an idea of the capacity of the battery and charger. The charger and battery need to have the same voltages. i.e. dont try to charge a 6v battery with a 12 v charger. The battery will be charged until it is full.