Quote:
Originally Posted by elcreative
[moderation edit]. I only went by the spec details from various manufacturers and the way they say Lithium polymer cells work but a Ph D in Theoretical Physics obviously trumps the actual specs (do a search for 'em yourself) and even the article has connections to other posts casting doubt on the claim/way the claim is put forward...
[moderation edit]
Also these batteries don't overcharge by being left on charge, they have circuitry to prevent that... and it works very well if not mistreated... it also seems that we were discussing the top end of the charging displays not the bottom and, again if you read the manufacturers' data, the batteries shouldn't drop to zero (causes irreversible crystallization of the cells) so the display doesn't actually mean zero when it says that, it means within safe minimum before closedown until recharge... [moderation edit].
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I never said everyone on here might not be qualified to speak at the level Dr. Soneria. Some can, some can't. I CAN'T. However, I respect his opinion. I simply mentioned I was an electronics technician so one could guage where I am coming from when I'm discussing MY understanding of lithium batteries. It has no other relevance.
I realize lithium batteries have cutoff circuitry and a low end cutoff voltage which prevents them from being fully run down to 0% and being damaged. From what I have read lithium batteries are seldom fully charged unlike other batteries nor is it desirable to do so. I have yet to find specs for a lithium battery which shows 80-90% is considered full charge. Again, I don't claim to be an expert and am open to learning.
It is my understanding that unless purposely limited a lithium battery will continue to charge to 4.2V and then the charger will reduce and end the charge at typically 2-3% of the initial charge and sometimes a little more. Again, I use my Viewsonic gTab as an example. It has a lithium polymer battery and reports being fully charged at 96%, the battery gauge NEVER reported 100%. Again, taking my limited research and understanding of lithium batteries I accepted this as normal, and I doubt most people would feel cheated if 100% was reported and it was actually 96-98%. However, in an effort to prolong battery life I suppose any manufacturer can stop charging the battery at whatever percentage they tell it to and report it as being "100 %" charged until an expert comes along and calls them out on it.