jahtav, sure sounds like a bad battery. It appears like it does not hold a charge. Of course, make sure that the contacts are clean etc. Follow this guide to change your battery. You can get a new battery from here Sony PSP Go Battery as well as many other places. Once you replace the battery, and it still does not charge, you can check the fuses on your logic board. Check those for continuity with a multimeter. Hope this helps, good luck.