On 28/02/2011 20:04, nestamicky wrote:
On 2/28/2011 10:56 AM, Ben Smith wrote:
Battery amnesia (also by Jeremy Kezer) runs in OS9 and has proved
invaluable both to test and to resurrect Pismo batteries in the
past, however it is $10 shareware (I cannot remember the limitations
if it is unregistered, try it and see!)
http://www.kezer.net/shareware/amnesia/
What do you mean "resurrect"?
Follow-up to my previous post,
I have just realised that the Pismo is Li-ion, the advice I gave will
still work, and is even more useful with new cells as the pack needs to
be FULLY charged - discharged - charged again in order to re-calibrate
the on-board monitoring circuit.
However I would strongly advise AGAINST re-celling a Pismo battery as
Li-ion cells are very dangerous if mishandled (I work with them and have
seen one do a good impression of a hand grenade when it was deliberately
short-circuited (in a "safe" location)).
That said, I have done it myself, and if you have access to either
"tabbed" cells OR a tab welding rig it can be done, just DON'T try
soldering directly to the cells unless you want to qualify for
disability benefit!!
However if the pack will not run the Pismo at all then you are probably
not going to be able to revive it, the control circuitry will not allow
the cells to be charged if they have dropped below a safe point (about
3V per cell) as the cell chemistry changes and they could overheat and
rupture if they were charged in this state.
Ben.
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