OT: Weird Laptop Battery Problem

[Bob Jonkman]

Isaac Connor <iconnor at connortechnology.com> wrote:

>On 11-10-06 10:48 AM, Lennart Sorensen wrote:
>> On Thu, Oct 06, 2011 at 12:02:07AM -0400, Alejandro Imass wrote:
>>> Apparently if you drain the newer Lithium-ion to zero they simply die
>>> and can't even be re-charged. This happened to me with a relatively
>>> new external (and quite expensive) APC battery. The guys at APC said
>>> it was because I left it uncharged for a few hours and it was exactly
>>> what happened! I drained it whilst working on a plane and forgot to
>>> charge it that night. Next day: dead.
>> What kind of APC battery?
>>
>> APC UPS batteries are lead acid and certainly don't have any such issue.
>>
>I have seen UPS's that if drained and left will no longer power on.  
>Trickle Charging the batteries for a minute and then re-installing in 
>the UPS will revive the UPS.  I have only seen this on cheap ULTRA 
>(Powercom) UPS's.  Never an APC.
>
>It's as if the charging circuitry needs some small amount of juice from 
>the battery to engage.  Weird, but I've had it happen 3 or 4 times now.
>
>This of course has nothing to do with Lithium-ion batteries in laptops.
>Sounds like a bad battery to me.
>
>Isaac
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