One thing I have obvserved over the years using mobile phones is that, those ones that charges very fast also tend to discharge at a very high rate.
Recently most mobile phone producers now make phones with inbuilt batteries with high quality and durability, and I have also observed that there is actually a difference. Those phones produced with inbuilt batteries last longer than expected and they don't really charge so fast at times.
I have a Samsung Galaxy that charges within 2hour but doesn't last even up 1 hour
My question :
Does it mean there is a direct relationship between the rate at which a battery discharges and the rate at which it is charged.
You would agree with me that, it is not how heavy a battery is that makes it last longer but rather the cell.
There is no relationship between the way a battery charges and the way it discharges for different makes of batteries. Though there is an exception in weak cells- they tend to charge faster than good batteries of the same make. What determines how long-lasting a battery can be is the battery makeup, i.e. the chemical composition of the electrolyte, electrode, and the type of reaction that produce the electrons.
The weight of a battery also has no direct correlation in performance in different battery type. For instance, lithium-ion batteries weigh much less than lead-acid batteries, but lithium-ion batteries still outperform lead acid ones.