Hi. I should probably already know this, but I don’t, so I thought I’d ask here.

If I have a charger marked as 1,5A and then try to charge a battery with 2Ah, what will happen?

  • Is the battery going to be charged, but slower?
  • Charged but not fully?
  • Not charged at all?
  • FuglyDuck@lemmy.worldEnglish
    101·
    2 months ago

    so 2Ah really means “2 amp-hour”. it measures how much of a charge it has- basically, you can draw 2 amps for one hour from the battery during ideal conditions (IE, it’s not an old battery, and everything about it is perfect- perfect temp, perfectly isolated from vibrations. all sorts o things. We never see that in the real world, however.)

    alternatively, you could draw 1 amp for 2 hours, or 4 amps for half an hour.

    1.5 amps is the amount of charge it’s providing to the battery, again, under ideal conditions (like temperature, etc.) a 1 amp charger would charge slower where a 2 amp charger would charge faster.

    The important thing is that the voltages match- 12v or 18v tend to be the most common. if the charger has too much amperage, it’s fine- the battery will only draw what it can use; too little and it’ll just take forever to charge.

    • Juvyn00b@lemmy.worldEnglish
      2·
      2 months ago

      Too much amperage for a circuit is fine, for a battery is not. A circuit will present a known resistance and draw what is needed for a specific voltage. The batteries’ resistance will be very low at empty and change over the course of charge, and certain chemistries can be damaged over 1C.