This is one of the Charge IC types.
Part Number : CT3582C
Function : 4.25V, Universal Charge IC
Package : DIP 8 Pin
Manufacturers : Shenzhen Coretech Microelectronics
See the preview image and the PDF file for more information.
1. support docking charger mode
2. supports normal mode and two lights three light mode, colorful lights mode
3. Automatic Identification battery polarity
4. Charge saturation voltage 4.25V (typ), can be adjusted through the L1
5. no-load voltage output
6. short circuit protection
7. minimal external components