hello friends! I have prepared an 20w inverter circuit using mosfet that is triggered by 555 timer ,for this purpose i have used 12v,1.3ahr battery and bulb glow is bright . After battery got discharged i have fully charged it again up to its maximum capacity and the moment i connect it to my circuit its getting discharged very quickly without litting up the bulb. could any one help me in telling how to identify the problem in battery? NOTE:the problem might be in the battery and not in the circuit because light glew when i used another dc source should i buy i more battery and how should i prevent the same problem repeating again in the new battery.