An interesting fact I came across recently – electric kettles in the US run at double the time for other countries – due to the US adopting a 110V power system. (And electrical kettle boiling duration being proportional wattage available). (1500W in US and 3000W in other countries).
I'm wondering how this applies to charging batteries. Does it take longer or the same time to charge a battery (from the mains) in the US compared to other countries? (What are the factors involved?)
But that's wrong – it's related to amp-hours (for NmHi) to charge a battery.
That leaves me with a question – do batteries take twice as long to charge in Australia as the US? If I move from Australia to the US will my phone charge faster?
My question is: Is lithium battery charging speed proportional to the amps provided from the power source?