The battery in my cell phone no longer charges. I took the phone apart and found the female connector for the charger to be broken off the PCB with some of the pads being torn apart in the process. I am sure that this is because of the junky charger I picked up on eBay that never fit quite right. I am planning to get a new phone mid-January anyhow, so this is not a huge problem, but I would like to charge this one a few times before then for emergency calls, etc.
The charger specs are:
5.2 +- .3V
460 +- 70mA
So I set up a circuit to mimic these settings -- ~5.2V through a 10 ohm (nominal) resistor and measured .45A at the terminals which I would like to connect to the battery.
The battery has 4 pads on it and two labels, + and -. I have made an illustration below. I would of course like to have pictures, but I do not have a camera. The numbers I show below are for reference and are not actually marked.
**broken link removed**
Where the circles indicating + and - are above the plastic divider between pads 1 and 2 (+) and pads 3 and 4 (-)
Using a meter, I find
V1-2 = 3.25V
V1-3 = 3.57
V1-3 = 3.78
So the question is, which pads do I apply power to? Also, as an aside, what do the voltage readings tell you? I work on embedded systems and this is not my strong suit!
V2-3 = 0V
V2-4 = 0V
V3-4 = 0V
The charger specs are:
5.2 +- .3V
460 +- 70mA
So I set up a circuit to mimic these settings -- ~5.2V through a 10 ohm (nominal) resistor and measured .45A at the terminals which I would like to connect to the battery.
The battery has 4 pads on it and two labels, + and -. I have made an illustration below. I would of course like to have pictures, but I do not have a camera. The numbers I show below are for reference and are not actually marked.
**broken link removed**
Where the circles indicating + and - are above the plastic divider between pads 1 and 2 (+) and pads 3 and 4 (-)
Using a meter, I find
V1-2 = 3.25V
V1-3 = 3.57
V1-3 = 3.78
So the question is, which pads do I apply power to? Also, as an aside, what do the voltage readings tell you? I work on embedded systems and this is not my strong suit!
V2-3 = 0V
V2-4 = 0V
V3-4 = 0V
Last edited: