I have a universal laptop adapter with listed voltage that i can set 12v/15v/16/18/19/20/24v.. i want to try it on my asus laptop with battery rating of +10.8v 4400mah, 27wh.. it's an li-ion battery. But i'm not sure if it's safe or not..

This is the universal adapter i have

Input: 110v-240v - 50/60hz 1.5A Max Output: 12/15/16/18/19V 4.5A Max 20/24V 4A Max https://www.lazada.com.ph/products/universal-laptop-charger-adapter-black-i1264107-s1509989.html

  • also superuser.com/questions/247312/… – Tetsujin Aug 8 '18 at 7:55
  • @Tetsujin That first one is not a dupe, it is the reverse situation. The second one is only about amperage, so does not apply either. Voting to reopen. – Jan Doggen Aug 8 '18 at 7:59
  • tbh, there's not enough information in this one to do anything other than mark it as a dupe & see if the OP will do some research. A mismatch of a single volt is very probably fine, but we have no idea what else the universal PSU supplies. Better to close as dupe to helpful info than close as 'unclear'. – Tetsujin Aug 8 '18 at 8:01
  • I updated it pls read – Kathleen magayao Aug 8 '18 at 8:12
  • Don't do it. You need to know what voltage, amperage and polarity your laptop needs. You risk to ruin your laptop. – Gerard H. Pille Aug 8 '18 at 8:21

It cerrtainly is not safe, if that adapter permits changing the polarity. It's not easy to repair when part of the charging circuit has been blown away. Concerning the adapter itself: can it deliver the necessary amperage? You should compare it with the original.

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