Datasheet

Simply remove the 10K surface mount resistor from the THERM pads (or cut the trace

going to it), and solder in a 10K NTC thermistor (http://adafru.it/372). Test out the system by

trying to charge while you place the thermistor in a freezer or against some ice, as well as

in a cup of > 50°C hot water. The charger should stop charging the battery. Once you are

sure it is working, attach the sensing element (the epoxy bulb in this case) so it is resting

against the battery.

Adjusting the Max Charge Current

The USB/Solar charger comes with a preset rate of 500mA which will work great for USB

ports, USB wall adapters and solar panels up to 3 Watts. If you have a project that uses a

larger panel, or perhaps some other sort of setup, you can easily adjust the current by

soldering a resistor into the PROG pads.