i have a battery which has:
maximum voltage : 4.35V
cut-off discharge voltage: 3V
i want to know what is the voltage which my product should be in 0% battery. is it 3V? Are we supposed to discharge until 3V or we should shutdown the embedded system at higher voltage, e.g. 3.3V? what is the norm for battery operated embedded system? what do they do in mobile phone design?
Cutoff voltage depends on battery, not on application.
For sure you may measure the battery voltage...but it gives not much information about health and charge status.
For better battery information you could use dedicated battery supervisory circuits, like charge counters.
if its a lithium battery then it may well have a circuit in it which stops you from being able to discharge it further down than 3v.
If not then you should put one such circuit in there.
But yes, dont go all the way down to 3v (or whatever is the cut-off)...go to 3.3v like you say.
With lithiums, if their voltage gets too low, they often cant be recharged safely....and you just have to recycle them.
Cutoff voltage depends on battery, not on application.
For sure you may measure the battery voltage...but it gives not much information about health and charge status.
For better battery information you could use dedicated battery supervisory circuits, like charge counters.