What will happen if I use 33W charger in 10W phone ?

Messages
77
Location
Kerala
ISP
BSNL Fiber
I bought POCO M2 Pro, which comes with 33W adapter. 11V * 3A = 33W. I have an old Redmi Note 4 device, which uses 5v * 2A = 10W adapter to charge. What will happen if I connect my 10W phone into 33W adapter ?

33W charger Description given below.

WhatsApp Image 2020-09-13 at 2.58.14 PM.jpeg
 

Nishant

Staff member
Messages
9,798
Location
Ulhasnagar, MH
ISP
HNS, BSNL
It will charge at 10w only.
 

Sushubh

Be nice pliss
Staff member
Messages
391,884
Location
Gurugram
ISP
Excitel
Airtel
Why do some power banks like mi have a special low power mode for wearables? I assume wearables have little space for proper charging circuitry so it is advisable to use low power charger on them?
 
Messages
4,366
Location
@socrateszero Mumbai
ISP
Jio Fiber. FTTH
For anyone who thinks that only voltage matters & not the amperage, I would like to say only one thing. A automobile spark plug cable carries anywhere from 15 to 25 kilo volts but ppl who feel it (including yours truly) live to tell the tale only because the amperage is v v low. If it was higher I wouldn't be typing this.😁😁
 
Messages
193
Location
Pathanamthitta, Kerala
ISP
BSNL FTTH | BSNL ADSL | Airtel 4G
@socrates I just wanted to help that guy feel confident. I still added a post below saying too high of an amperage could be dangerous, but what do I know, I'm just saying things from class 12 physics😅.

I understand you had some experience (good and bad) working with these, would you think a 2A charging circuit on a phone which does take more than that from 2A chargers can stop the excess current from a 3A charger?
 
Messages
4,366
Location
@socrateszero Mumbai
ISP
Jio Fiber. FTTH
No offense meant buddy✌🏻 I would prefer to err on the side of caution & not be too trusting wth the circuitry in phones or chargers for 2 reasons.
One is even if things are in tip top quality, things wear out.
Two Different companies use different types of circuitry, I am not too sure they are all compatible with each other.
And I always remember that a Li ion battery is a potential fire hazard.
Also though there are standards to be followed I am not too sanguine about whether they are followed by all & whether there are checks by any institution that standards are followed.
 


Last edited:

Sushubh

Be nice pliss
Staff member
Messages
391,884
Location
Gurugram
ISP
Excitel
Airtel
Google today require all androids to be compliant with USB PD spec. Recent phones should be fine as a result. Of course, things can go wrong.
 
Messages
193
Location
Pathanamthitta, Kerala
ISP
BSNL FTTH | BSNL ADSL | Airtel 4G
Thinking about it though, I don't think I'd ever put anything other than standard Mi charger on my Note 5 if I can help it. Not when it's my only phone 😅. If I am in an emergency or if I can afford another phone easily then yeah, but I'd still go back to using the manufacturer one.

@mahadevan_iyer if you can,you can buy a replacement adapter from Xiaomi. It costs around 300-400 I think for the 5V2A. Think of it as insurance xD.

Since it's your old secondary phone, and If you think it isn't worth the 400 rupees investment then you can use the Poco one, both are from the same manufacturer, should be fine.

The way we treat our electronics change according to how easily we can replace them.