li-ion battery charger

Charging a 8800 mAh Li-Ion Pack This is perhaps very cheeky of me to ask for your help, but my design skills are limited in electronics and as a volunteer my budget is limited. I am a volunteer for a local Search and Rescue organisation (Suffolk Lowland Search and Rescue), we are on call 24hrs...

This is a simple to build charger for single 3.7V lipo battery. The heart of the charger is TL431 shunt regulator that controls the incoming current. Charger comes with a convenient charging LED indicator. As charging current goes down so does the intensity of the LED