truongster
New Member
Hey fellas, found a forum that might be of great use in the future.
Firstly to starts things off. How does mAh scale in portable electronic device batteries.
E.g. The batteries in phones.
For example the SG3 has a 2100mAh battery at 4.35 V - It starts here when fully charged and it's rated for 3.8V. with 7.98 Wh.
Just from my year 9-10 Electronics class I have a very basis understanding of what it all means.
My question is, does mAh scale linearly, e.g. 2000mAh is lasts twice as long as 1000mAh in normal operation.
I know it's milliAmps per HOUR so I just want to affirm this.
Secondly if a battery that is in use has a 2100mAh battery, and on the markets there are advertised 3000mAh external batteries for recharging your phone on the go.
What I am confused is the external batteries are outputing 5Vs, does this make a difference in terms of mAh. So if a 4200mAh external battery can recharge a depleted phone battery twice?
Lastly, I understand some physics and distribution of energy. If both the external battery and the phone battery are rated at 2100mAh and the external battery has 5v Output into the phone's input, wouldn't connecting the two charge the depleted battery to half so that there is equal energy in both batteries?
Thanks in Advance~
Firstly to starts things off. How does mAh scale in portable electronic device batteries.
E.g. The batteries in phones.
For example the SG3 has a 2100mAh battery at 4.35 V - It starts here when fully charged and it's rated for 3.8V. with 7.98 Wh.
Just from my year 9-10 Electronics class I have a very basis understanding of what it all means.
My question is, does mAh scale linearly, e.g. 2000mAh is lasts twice as long as 1000mAh in normal operation.
I know it's milliAmps per HOUR so I just want to affirm this.
Secondly if a battery that is in use has a 2100mAh battery, and on the markets there are advertised 3000mAh external batteries for recharging your phone on the go.
What I am confused is the external batteries are outputing 5Vs, does this make a difference in terms of mAh. So if a 4200mAh external battery can recharge a depleted phone battery twice?
Lastly, I understand some physics and distribution of energy. If both the external battery and the phone battery are rated at 2100mAh and the external battery has 5v Output into the phone's input, wouldn't connecting the two charge the depleted battery to half so that there is equal energy in both batteries?
Thanks in Advance~