Charging a mobile using USB3 lead

Oblivion

pappa_golf wrote: »

and pedantic people often have better answers , over to you

Well actually, whist I was reading the thread I was thinking that most modern devices with rechargeable batteries have their own built-in circuitry to control the charging rate so that they don't get fried.

pappa_golf

then why not mention that instead on nit picking?

Oblivion

pappa_golf wrote: »

then why not mention that instead on nit picking?

I see the humour bypass surgery was a great success. :beer:

50Twuncle

pappa_golf wrote: »

yes


the more currant that is available the quicker it will charge


eg: car /bike battery charger 1/2 might take 30 hrs , 5a might take 5 hrs

True - but the current depends on fthe impedence - which is fixed

pappa_golf

50Twuncle wrote: »

True - but the current depends on fthe impedence - which is fixed

so , can you answer your original question , using the data you have posted in your last post?

Rubidium

50Twuncle wrote: »

True - but the current depends on fthe impedence - which is fixed

You are showing your ignorance again.

This is direct current!

50Twuncle

Rubidium wrote: »

You are showing your ignorance again.

This is direct current!

And I suppose DC doesn't have impedence ?
who's ignorant now ?
go away cto€

pappa_golf

a correctly setup usb 3 cable can give a maximum of 900ma


a 1a mains charger gives 1000ma


a 2 amp mains charger will give 2000ma


a phone will charge quicker from a higher wattage capable supply (with limitations set by the phone)


"If I charge it - from a USB3 socket on my PC - Will it charge any faster than from the mains ?"




I have no idea , how about phoning a friend?






beware chargers that are rated at 7.245678 ohms

grumbler

50Twuncle wrote: »

True - but the current depends on fthe impedence - which is fixed

It isn't fixed as the charging circuit is active and adapts.
And the charger has protection in place to limit the current.

50Twuncle wrote: »

And I suppose DC doesn't have impedence ?

Normally 'impedance' is used for AC circuits. For DC it's 'resistance'.

50Twuncle

https://en.m.wikipedia.org/wiki/Electrical_impedance
DC does involve impedence as does AC