Charging my Cell Phone

 Hi Guys & Gals;

I puchased a cell phone, a Sony Ericsson Z200, and I decided to only
charge it by solar power (nice in theory). I had my phone for a month
and it pooped out, the battery had a great charge, but the phone had
no life at all. Totally fried.

I exchanged the phone for another one, brought it home, ran down the
battery (as suggested) and this time I charged it from my battery bank
using the correct 12 volt plug instead of using the wall charger and
my (cheepo) inverter.

Well, I once again have a fried phone, please help, what should I do?
Can a cell phone be safely charged with a square wave inverter? Is
there anything that I should know before I buy and charge another one?

  Sounds like the phone doesn't like very much more than 12v going into it
(which you will probably get from a solar panel, or perhaps a battery
bank when it's charging).
Most cellphone chargers have a transformer in them, so you *should* be
okay running the charger via an el-cheapo inverter. If you have an
ohmmeter, put it across the power cord of the charger for several
seconds. If you get a reading of, say a couple of hundred ohms
 >CONSTANTLY< then it will have a transformer.

iamhungery@shaw.ca wrote:

 I cooked a 12v battery drill charger (but not the drill itself), on a
square wave inverter - often these switched-mode chargers need the
sinewave to work correctly.
Of course, if the charger attached to a phone fails if may very well
cook the elctronics in the phone (electric drills are generally more
robust than phones)
In the light of this I would not use any kind of square or mod-square
inverter on those type of chargers.

However, it sounds as if you also had trouble charging on a 12v cig
lighter socket type charger - I don't know why that should be.
Usually they are built to take much more than 12 volts (car batteries
under charge often go to 15v or more). You mention that you ran the
voltage down a bit, so unless it was actually TOO low (Isuppose that
might cause damage?), really something must been faulty.
Presumably it worked ok for a while? (unless the battery volts were
reversed of something?)

Just by tuppence worth

Eric

On Sat, 26 Mar 2005 07:15:22 GMT, iamhungery@shaw.ca wrote:

 

Some of this is not clear. Did you run the charger off the 12V battery or an
inverter?

Many chargers control the current / voltage by chopping the quantity down by
time slicing the on off ratio. This depends on a fairly stable input power.
If you feed a MSW inverter into a chopper circuit trouble may result as the
frequencies can interfere with each other' s operation.

 take a look at http://www.web7days.com/led    they got the solar power
control centre for cell phone charging purpose