Charging the battery terminal voltage at the start not to be around 4.0V. 5V supply voltage difference is 1V × 500mA = 0.5W maximum heat. If you need a radiator temperature ℃ 20 degrees.
　Dattari 6V power supply, poorly, or if the battery voltage is required because the heat radiator. MCP73831 is very small. Package height is about 1mm. SOT23-5 package. Foot spacing is 0.95mm. The DFN package can be soldered with a soldering iron. Two resistors, two capacitors, LED1 a charger if you have the voltage regulator in addition to the individual.

Schematic of basic use. Experimental breadboard
1100mAH Lithium Polymer battery charging Serubatteripakku 2. RC lithium polymer batteries can be charged for Serubatteripakku a multi-cell charger for cell number, multiply the length times the pin out so that each individual cell.
This instrument is a little difficult to use. The software isn't made.

Charging current measurements. That the use of National Instruments USB-6008.
First degree battery voltage 3.7V, 4V after power-on and then took 40 minutes to reach 4.2V. The charge current is 4.2V charging voltage go down a little bit before. Down at approximately 50mA charging current charges to the extent not completed. 1C (1000mAH battery if the charging current of 1000mA to mean) are fully charged battery charge takes about 1.5 hours.

15mA ~ 500mA charge current of the charger circuit diagram can be changed with reference to Rotaridippusuitchi.
　• The green LED lights and power.
　- Charge current set Rotaridippusuitchi.
　- Connecting the battery and the red LED lights.
　- Red LED is off when fully charged.
Rotaridippusuitchi positive logic for setting the charge current (also known as real code) to use the thing.

The charge current of the circuit
The charge current is determined by:
　Charge Current [mA] = 1000 ÷ PROG pin lead to resistance [kΩ]
Attach a worksheet to keep the calculation of the resistance of the circuit are summarized in the following