OK silly question but...

[Rayan]

Re: OK silly question but…

@Cheegum

Yes today’s water taknks are smart enough with such functions, why then does the phone give the message i.e. tanki is full please shut off the tap? (re: first post)

Because of this

@Rayan

Southie was correct, but i will add little more to what he said already,

Li-Ion or Li-Polymer batteries (the one used in almost all mobile phones/tablets and laptops) doesn’t have the memory problem like Ni-Cd or Ni-Mh batteries (used in cordless phones and home appliances), even then it is advised to disconnect the charger when the battery is completely charged as this prolonged charging will increase the battery temperature and voltage, that degrades the battery lifespan. And charging to 100% and discharging to 0% is also a myth that people spreads around the internet, you can charge or discharge at any charge level you wish. The recommended charging - discharging cycle will be - charge till 80-90% and disconnect and use till the 20-30% of the charge and start charging.

And this

@Southie

Raysn - I agree. Charging to 80% prevents high V. I terms of temp it is mu understanding internal resistance drop with increasing SOC. So temp not as much of an issue. Esp because liking batteries have an upper volt limit at which current tapers. So no question of highrt T.

But if one is using battery while it is at high Soc then chg current can be high for prolonged period at high V conditions as opposed to reaching upper V limit and tapering off - may result in an increase T also in that case.

Bottom line - continued exposure to highV and high T bad.

And this Battery University | BU-409: Charging Lithium-ion

And this Learn About Batteries | Battery University

And this Ask Ars: What is the best way to use a Li-ion battery? - Ars Technica

And this Cutoff voltage - Wikipedia, the free encyclopedia