Battery shelf life?
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From: doddie on 12 Apr 2008 21:06 as header, got 1 here to sell, cant test it tho, would it hold its charge ok? unused but 2yrs old thx in advance
From: Woody on 13 Apr 2008 11:17 Check the voltage on the terminals. If 0 it is dead. I have one for my two year old R51 never used and It is dead. Won't charge and 0 volts on the terminal. "doddie" <hhh(a)hhh.com> wrote in message news:ftrmaa$90u$1(a)registered.motzarella.org... > as header, got 1 here to sell, cant test it tho, would it hold its charge > ok? unused but 2yrs old > > thx in advance >
From: BillW50 on 13 Apr 2008 12:31 > "doddie" <hhh(a)hhh.com> wrote in message > news:ftrmaa$90u$1(a)registered.motzarella.org... >> as header, got 1 here to sell, cant test it tho, would it hold its >> charge ok? unused but 2yrs old >> >> thx in advance > In news:JtpMj.1549$I55.1011(a)newssvr22.news.prodigy.net, Woody typed on Sun, 13 Apr 2008 11:17:13 -0400: > Check the voltage on the terminals. If 0 it is dead. I have one for > my two year old R51 never used and It is dead. Won't charge and 0 > volts on the terminal. Some batteries will read zero when they are not. The batteries for my Toshiba 2595XDVD laptops will always read zero on the plus and minus terminals if it isn't inserted into a charger or the in laptop. As there are two terminals on top of the battery that needs to be shorted and this connects up the positive terminal. Also most Li-Ion batteries has safety circuits which is in between the battery and the outside world. One of them acts like a resetable fuse. Sometimes they fail and just open up. Another common one is they will disconnect the battery from the terminals if the voltage per cell hits something as low as like 3.2VDC. As charging low Li-Ion cells can burst into flames. So there are a number of reasons for a zero reading when in fact the battery may not be. -- Bill
From: M.I.5� on 14 Apr 2008 10:52
"doddie" <hhh(a)hhh.com> wrote in message news:ftrmaa$90u$1(a)registered.motzarella.org... > as header, got 1 here to sell, cant test it tho, would it hold its charge > ok? unused but 2yrs old > Unused is not good. Li-ion batteries like to be used. If they are not, internal changes cause the series resistance of the cells to rise. Although they may retain their original capacity, the series resistance can fool the monitoring circuit into thinking they are discharged when they are not, particularly under a heavy load. The only sure way is to try the batteries in their laptop. |