Odd phenomenon when charging.

Search This thread

PcFish

Senior Member
Jul 13, 2010
890
105
Samsung Galaxy S22 Ultra
I'm procrastinating at work, noticed something weird.
When the phone is charging, I glide my fingers across the back, and feel a faint charge, kind of like the phone is vibrating. Maybe my fingers are super sensitive to the grooves in the finish? I don't know.

As an engineer, let's go about this scientifically.

Control:
  • Naked HTC One M8 (Gunmetal) with Spigen Tempered Glass Protector
  • OEM HTC Charger that came with the phone
  • Plugged in to a surge protector. The only other thing plugged in is the AC Charger for my HP Elitebook
  • Phone is face down while plugged in on wooden desk

Test:
  • Gently glide finger across the back of the phone.

Anyone else feel this? Or am I going crazy at my government job?
 

BenPope

Senior Member
Dec 20, 2007
3,896
1,118
Next step is voltmeter and phone case vs ground. It's possible that the charger isn't properly grounded, so although it only delivers a potential of 5V, those 5V are sitting on a 50Hz sine wave of, maybe 30-50V (thats a guess based on my experience of electrical shocks).
 

badboy47

Senior Member
Nov 23, 2009
2,138
1,093
3460846-jim-carrey-jim-carrey-31633722-500-288.gif


Sent from my HTC One_M8 using Tapatalk
 

jcau

New member
Sep 8, 2015
1
0
I have felt it forever but my baby just felt like that because he was sitting on the charging phone. Suddenly it is more disturbing than neat.
 

khporosh

New member
Mar 11, 2017
1
0
I felt it for a long time. I use it as a indicator of charger quality. My HTC one m8 charger that came with the box charged it without any problem at all for the first few days. Then suddenly this vibration arised from nowhere. I tried another m8 charger it didn't cause the vibration. Then i tried some aftermarket nonbrand cheap chargers, all of them caused the same vibration. Then i tried a two samsung charger that came with my two other phone, they didn't give any vibration at all. Then I tried a Xiaomi charger that came with Redmi4prime, it was also perfect. BTW all of the chargers I used are two pin, no ground whatsoever.
 

Top Liked Posts