On 12 June 2012 16:58, Benjamin Tayehanpour <[email protected]>wrote:
> None whatsoever. :) There are authoritative sources on battery technologies and one that requires you to frequently drain a battery is quite not there... or if it is... may be out-dated. More recent batteries that carry with them control circuits do help one ensure that the batteries are not drained beyond a cartain point. this is to ensure that the point of no return is not reached quickly with a battery as happens with frequent discharging and deep discharging. But logically it fits. A battery degrades over time, and the only way for a > controller circuit to know the rate and extent of this degradation is by > actual measurements when the battery discharges, and if it never > discharges, no measurements can be made. > > It is not required to completely drain batteries once in a while. This is a myth, just as it is a myth that replacing the electrolyte in a battery gives the battery a new life. Batteries all work by a chemical reaction that takes place between two elements. the more you let these chemicals/elements change from the active state to one that has reacted with the chemical/element that causes current to be generated the faster the battery dies. the more frequently you drain a battery, the more frequently you have to charge it. This usually means the more often you force the chemicals/elements back to their active state (or original state). this charging wears out the chemical/element and is one of the reason one is advised not to drain batteries beyond 50% of its capacity. Battery control circuits are usually designed for a specific make and manufacture of a battery; which is why you are required to replace worn out batteries with their specific model. You cannot use just any 12/18 volt battery that fits your laptop. It wont charge in the required time or may get over-charged or get under-charged. The battery control circuit for your laptop is designed specifically for that battery designed for the device. The control circuits are, for lack of better words, hard-coded with the battery specifics; charge method, battery full voltage, battery float voltage, battery low voltage and current drains for each. The 'charge sensors' actually follow these specific values that are 'hard-coded' in the circuits to ensure that the charging current and voltage are controlled accordingly. what it knows about the battery and what it reads from the battery are what the control circuits use to tell you how much battery capacity/time you have. Charging could then be either simple charging which is really pulsing a DC current through the battery, trickle charging, time-based charging or what our laptops have and many control circuits have, an intelligent/smart-charger. On 12 June 2012 16:37, Peter C. Ndikuwera <[email protected]> wrote: > >> On 12 June 2012 16:01, Benjamin Tayehanpour >> <[email protected]>wrote: >> >>> >PS: the life span of a battery is determined by how frequently its >>> discharged below its 50% capacity and how long it stays below that. if you >>> want a >longer life out of your battery, keep it fully charged or if you >>> cannot, then do not discharge it too low too frequently >>> >>> True to a certain extent, but not entirely. While it is correct that >>> Li-ion and Li-Po batteries should not be discharged entirely on a frequent >>> basis, the battery control circuits in a battery back will not let you do >>> so, ever. When a laptop battery reports that it is "empty" it really means >>> drawing more current would be fatal to the battery cells. >>> >>> That said, you still should not drain the pack often. But it is >>> recommended that you fully drain it about once a month or so, to calibrate >>> the charge sensors. >> >> >> There's a lot of conflicting information out there. Including information >> that the whole "battery calibration" thing is a myth. >> >> Any authoritative sources? >> >> _______________________________________________ >> The Uganda Linux User Group: http://linux.or.ug >> >> Send messages to this mailing list by addressing e-mails to: >> [email protected] >> Mailing list archives: http://www.mail-archive.com/[email protected]/ >> Mailing list settings: http://kym.net/mailman/listinfo/lug >> To unsubscribe: http://kym.net/mailman/options/lug >> >> The Uganda LUG mailing list is generously hosted by INFOCOM: >> http://www.infocom.co.ug/ >> >> The above comments and data are owned by whoever posted them (including >> attachments if any). The mailing list host is not responsible for them in >> any way. >> > > > _______________________________________________ > The Uganda Linux User Group: http://linux.or.ug > > Send messages to this mailing list by addressing e-mails to: > [email protected] > Mailing list archives: http://www.mail-archive.com/[email protected]/ > Mailing list settings: http://kym.net/mailman/listinfo/lug > To unsubscribe: http://kym.net/mailman/options/lug > > The Uganda LUG mailing list is generously hosted by INFOCOM: > http://www.infocom.co.ug/ > > The above comments and data are owned by whoever posted them (including > attachments if any). The mailing list host is not responsible for them in > any way. > -- Mike Of course, you might discount this possibility, but remember that one in a million chances happen 99% of the time. ------------------------------------------------------------
_______________________________________________ The Uganda Linux User Group: http://linux.or.ug Send messages to this mailing list by addressing e-mails to: [email protected] Mailing list archives: http://www.mail-archive.com/[email protected]/ Mailing list settings: http://kym.net/mailman/listinfo/lug To unsubscribe: http://kym.net/mailman/options/lug The Uganda LUG mailing list is generously hosted by INFOCOM: http://www.infocom.co.ug/ The above comments and data are owned by whoever posted them (including attachments if any). The mailing list host is not responsible for them in any way.
