Hi Guys! Apologies if this is the wrong board for this question.
I just finished building a Solar LiPoly + Mintyboost system, but I'm wondering if there might be an issue with the Solar LiPoly component.
First, a rundown of my parts:
Version 3.0 Mintyboost
USB / DC / Solar Lithium Ion/Polymer charger - v1.0
LiPoly battery (the 3.7V, 1300mAh one recommended by Adafruit for this project)
I was able to successfully solder and assemble both projects.
If I hook up two AA batteries to my MintyBoost, the system charges my iPhone 4S immediately with a verifiable increase in charge percentage oh the phone, so I think the MintyBoost is working properly. Initially, I was able to plug in my battery to the BATT port into Solar LiPoly project board, and plug the Mintyboost into the LOAD port and the phone would charge without a problem! I only had it do this for a couple minutes before I decided to detach the LOAD (MintyBoost) and attach a USB cable to the USB charging slot, because I wanted to charge the battery up.
So here comes the problem, after about 2 minutes of charging (red PWR GOOD light active, orange CHRG light active), the green DONE light illuminated. Unless my LiPoly battery came to me fully charged, I don't think this should happen!? I decided to let my iPhone charge a little bit more in case the battery really was full. So I detached the USB cable and reattached the MintyBoost. The phone charged for about 20 minutes, and then I once again detached the MintyBoost and reattached the USB cable. This time the CHRG light illuminated for about 10 seconds and then the DONE light came on RIGHT after. At this point, if I try to charge my phone again (without the USB connected), it will charge for about 5 seconds and then stop charging, as if I'm just getting a quick jolt of power from the battery before it falls below acceptable voltage and shuts itself down. I get no status lights on the LiPoly board.
Additionally, now if I plug in the USB charging cable to the Solar LiPoly project board, usually all three status LEDs will light up, even without any LOAD or BATT attached! I can plug in the battery, and there is no change. I'm assuming the problem here is that the battery just isn't charging because the Solar LiPoly project board always has the DONE light illuminated. If I plug all three components in (Mintyboost, Battery, and USBS charger) the phone goes into charge state and will charge a little bit, my Multimeter reported 200 mA going to the mintyboost. If I unplug the battery, I only get about 20 mA going to the MintyBoost, so the phone will claim it is charge mode (correct voltage), but it will not actually increase the charge (I'll see charge percentage decrease at a normal rate).
What do you guys think? Am I missing something obvious? Is the battery dead, or possibly the Solar Li-Poly board?