I have been having problems charging my phone for a few days. I suspect the
socket in the phone. 2 different charges wont charge it.
I had to buy a new phone today as it gave up but assuming it isn't the
battery how can I charge the battery so I can get the data off of the phone?
The phone charger input is likely at a different voltage to the natural cell
voltage of the battery (eg 5V from USB v 3.6V from lithium ion). The
battery charge circuit might not like that.
As it is, you might still have difficulty: the battery smarts won't be
there. Depends whether the phone will power up if it has a voltage but
can't read status from the battery.
Phone batteries are not *usually* that smart - they usually have a
simple analogue circuit which will disconnect the battery to prevent
overcharge or overcurrent. The third terminal is usually a thermistor
connected to the negative terminal which the charging circuit in the
phone uses to monitor battery temperature.
I have successfully charged phone batteries from a bench PSU.
The maximum voltage for a single cell is 4.2V.
Any commercial battery will probably have a protection module to prevent
over voltage so you would almost certainly get away it if you did set
the voltage a bit too high but all the datasheets I have seen recommend
that you don't rely on the protection module for for charge termination.
Umm -- being thick here, sorry: everyone's assuming that the phone will
not work when plugged into its charger. Is that so?
I mean: I recently changed my phone for the same reasons: my phone
worked ok when plugged in, so I transferred all data (not much!) to the
SIM, then swopped the SIM out to the new phone, transferred all data to
that phone, then swopped the new SIM back in. (Advice to do this is in
my new phone's instructions booklet.)
...But I guess your phone's not working when plugged in...
p.s.: John Rumm < firstname.lastname@example.org> wrote: > Yup, BTDTGTTS. ...
Not now. The connection was a bit iffy for a week. Lay the phone down in not
quite the right position it would stop charging then I would have to hold
the plug in tight but now nothing.
I will try and find somebody with a phone with same battery the get the
contact list off of it but Samsungs don't seem that common.
I have successfully charged Lithium Ion phone batteries from a bench
power supply at 4.2V with the current limit set to < 1/10th of the
battery capacity (e.g. < 100mA for a 1Ah battery)
Lithium ion batteries can burst into flames in a very spectacular way if
abused so be careful (the battery pack will have protection electronics
to protect it from overcharge so it's unlikely to explode but it can
Alternatively, if you just want to get data off you could connect a
suitable power supply directly to the battery contacts on the phone.
For a lithium ion battery anything between 3.3 and 4.2V should work.
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