A few months ago I purchased a 3.7v - 10,000mah LiPo battery and project case from ebay. The battery came with a pcb installed and the case came with a pcb to attach to the battery and mount to the case. I did that and then charged it. It displayed 100% and I was excited. I let my S3 discharged to about 25% remaining and plugged it into my new charger. My oem phone battery is 3.8v - 2,100mah so if I understand the math, my new charger should be able to charge my phone from say 10% to full at least 4 times before needing to be recharged itself.?
So my phone at 25% is plugged in to the new charger and in about 20-30min the charger is displaying 76% and the phone is not even close to full charge. So after a while I decide that perhaps the pcb boards on both the case and the battery are fighting each other, is that possible.? Yesterday I took the yellow cellophane tape off the top of the battery to expose the pcb. I then removed it with the help of my soldering iron. I cleaned up the battery tabs and soldered the case pcb to the battery.
All day yesterday I monitored the battery during discharge (charging my phone) and charging for any heat issues because I know LiPo batteries are no joke. So far there haven't been any heat issues and the discharge rate seems to be inline now with my math because it only discharged 4% to charge my phone from 96% to full in just under 10 minutes.
Any here's a picture (I hope) of my project and let me know what you think of my ramblings. (I couldn't find the "advanced editor" button so I clicked on "upload a file" let me know if you see my picture)
So my phone at 25% is plugged in to the new charger and in about 20-30min the charger is displaying 76% and the phone is not even close to full charge. So after a while I decide that perhaps the pcb boards on both the case and the battery are fighting each other, is that possible.? Yesterday I took the yellow cellophane tape off the top of the battery to expose the pcb. I then removed it with the help of my soldering iron. I cleaned up the battery tabs and soldered the case pcb to the battery.
All day yesterday I monitored the battery during discharge (charging my phone) and charging for any heat issues because I know LiPo batteries are no joke. So far there haven't been any heat issues and the discharge rate seems to be inline now with my math because it only discharged 4% to charge my phone from 96% to full in just under 10 minutes.
Any here's a picture (I hope) of my project and let me know what you think of my ramblings. (I couldn't find the "advanced editor" button so I clicked on "upload a file" let me know if you see my picture)