My grand i10 petrols exide battery died in just 2.5 years of the car. There was no warning as such like car having issues starting or stuff getting dim etc. One afternoon i drove and parked it in a basement and after 1 hour it just refused to start with lights getting dim and meter not working/doors not locking etc. Had to call someone to get a spare battery and using that started on the first crank. Got battery checked at 2 places and both said 1 cell is dead. Directly went to amaron dealer and got one MF battery for 3500 after buyback. Wondering if the pioneer HU and comp speakers have led to faster degradation as besides that no electric stuff has been added.