My iPhone 3GS before some weeks ago if the battery up to the proportion of 60% or 50% has gone automatically to shutdown...
And before two days Stopped and does not accepted to charge battery, Then yesterday i have changed battery to new one and my iPhone work again, But same issue still happened if the battery up to the proportion of 60% or 50% has gone automatically to shutdown and also if i open youtube on safari or whatsapp or any Games even battery up to the proportion of 90% or 80% iPhone has gone automatically to shutdown and doesn't accepted to turn on only if the charger reaches to iPhone
And before two days Stopped and does not accepted to charge battery, Then yesterday i have changed battery to new one and my iPhone work again, But same issue still happened if the battery up to the proportion of 60% or 50% has gone automatically to shutdown and also if i open youtube on safari or whatsapp or any Games even battery up to the proportion of 90% or 80% iPhone has gone automatically to shutdown and doesn't accepted to turn on only if the charger reaches to iPhone