High pitch noise from the charger

[krzychoniusz]

Hi all, I have a new battery and charger having done only about 5 charging cycles. I noticed last night the charger makes a high pitch noise when the battery is being charged. I noticed this when battery was almost full, but perhaps the noise was there before and I just wasnt there to pick it up as i normally charge it when going to sleep. I read online some users have had this problem occuring when battery is nearly charged to full, but could not find any conclusion. Is this something I should be worried about? The battery is 52V 14s6p panasonic PF from ev3ev and the charger is 58.8V
Thanks

 

[KirstinS]

I understand this to be quite common , especially when on 240v mains , it’s the transformer working (resonance ?)

I am far from expert but I don’t believe it to be an issue ...

Others will know more than me for sure


Sent from my iPhone using Tapatalk

 

[krzychoniusz]

Thanks. Charging is direcly from a home socket and noise appears only when charge is near full. Apart from the noise the charger seem to work correctly, i.e. does charge and does not seem to get hotter than usual.