Car chargers

[milomak]

Is there any research out there that gives an idea of:
i) do car chargers diminish the life of the phone battery, and
ii) by how much one can expect the life to de depleted?

 

[Budza]

While we're about it, what about USB chargers, if phone charges when plugged into computer?

What about leaving the phone plugged in when its fully charged?

 

[kronoSX]

yes they do

 

[Colin62]

I don't see that they do - if they are charging at the same rate (which implies the same voltage) then they will not diminish the life of the battery anymore than a mains charger. My (genuine Nokia) car charger actually takes longer to charge my phone than my (also genuine Nokia) mains charger that came with the phone.

 

[Gadget Man]

I've noticed that my SE last longer when charged through a mains charger as opposed to a car charger or a USB charger. Battery starts off being full ... but it depletes sooner when not charged on a mains charger. There must be something about the strength of the charge of a laptop or car charger.

 

[andres101]

dablakmark8, any proof or perhaps a reason why?

my car charger stopped working after I updated my phone firmware (V5.5 to V7). when I plug it in, a message pops up on screen saying the charging device is not supported.

my USB and wall-socket charger still work fine.

 

[SoTrue]

dablakmark8, any proof or perhaps a reason why?

my car charger stopped working after I updated my phone firmware (V5.5 to V7). when I plug it in, a message pops up on screen saying the charging device is not supported.

my USB and wall-socket charger still work fine.

You must also update you car's firmware.

 

[Budza]

My USB charger (via computer) struggles to get battery above 90%, as displayed in Phone Status (SE phones)

"High Power USB port must be between 4.75 and 5.25 volts"

My charger's output is 4.9 VDC @ 450mA

Why does USB not compare?

nOOb Q:

My car mp3 player has a USB port, but when phone USB cable is plugged in, it doesn't charge phone. Any ideas?

 

[andres101]

My guess is that your motherboard manufacturer took some shortcuts and cannot supply the specified power. Very few USB devices will actually draw 500mA for extended periods.

The charging procedure is done at constant voltage with current limiting circuitry. This means charging with constant current until a voltage of 4.2 V is reached by the cell and continuing with a constant voltage applied until the current drops close to zero.

It could also be that your battery can only hold a charge of 90% of the original capacity.

My car radio does the same thing. If I plug a USB device in, the radio waits for a few seconds for the device to identify itself as a "USB Mass Storage Device" and if it doesn't, it powers the port off. The radio keeps powering the port if I set my phone to "Storage Mode".

 

[Rouxenator]

Phones are pretty smart when it comes to accepting charge voltages and currents. On all Nokia phones since the 1610 of 1995 you will find that an unusable voltage or current will result in a "Not charging!" message. If the phone is off it will simply make a beep and no charge indicator will be shown.

So no, I do not think any charger can harm your phone as they are smart enough to know what to accept.

OK - I guess if you are gonna supply it with way to much you might blow it, but that is not very likely to happen.