weather laptop will be affected if i use dead charger while working

Solution
So you were not talking about your charger, but about your battery. Maybe the battery is defective or the charging circuit on the motherboard of the laptop, you can use the laptop without problems if the battery is not good.
Hi, it will have no effect on the laptop, it's like you have nothing connected to the laptop. So why do you connect a dead charger to the laptop?
 
MERGED QUESTION
Question from shriraksha : "about battery life"



 
So you were not talking about your charger, but about your battery. Maybe the battery is defective or the charging circuit on the motherboard of the laptop, you can use the laptop without problems if the battery is not good.
 
Solution