Originally Posted by
n4zou
If the load connected to the USB port draws less then 500mA excess current will be forced into the device damaging it. The rechargeable batteries absorb this excess current as recharging current so any devices connected to the USB port will not be damaged and will only draw the required current from the batteries.
1) What about overcharging the batteries. Would leaving them there once fully charged be a problem?
2) To put this together, you'd just need the four diodes, wire, breadboard of some type, maybe a box to put it in, and a soldering kit? It's been a long time since I soldered.....
Thanks,
pete