On 12-06-06 08:45 AM, Nick Nobody wrote:
On Wed, 2012-06-06 at 08:22 -0400, Stefan Monnier wrote:
What can I do to use up my laptop battery as fast as possible? I am breaking
in an external powerpack on a netbook... playing a video is not fast
enough lol.
Why on earth would you want to do that?
Li-ion/Li-poly has no such thing as "breaking in". You may completely
break it if you really empty it completely (tho usually the circuitry
around it should try and prevent it from happening), and even if you
don't empty it completely, emptying it will shorten its life expectancy
and reduce its capacity.
Stefan
That's a very good point. Jeremy, explain yourself :P
I assumed he was doing it to calibrate the power management software. By
running the battery down to nothing you should get a better estimate of
battery capacity in the future.
nick
The battery manual very clearly and adamantly says to do this (3 times).
It is a 22000mAh solar charged power panel. I believe it is so that the
internal charge monitoring device can calibrate itself. It has a battery
percentage that shows on the front and the charger is supposed to charge
normally until 4.2V is reached then trickle the charge off.
Let's put it this way: the truth about how to treat LiPo and other cells
are murky. I can find plenty of people saying you must break them in,
and plenty saying this does nothing, and plenty saying this destroys the
battery. I think the truth is somewhere in between. Note that most
people say a full cycle is needed after long storage of a LiPo cell.
I use lots of rechargeable AAs and often put them through a cycle to
determine their capacities. Doesn't seem to hurt them much as I have
ones that are years old now still going strong.
Jeremy
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