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Re (2): Olympus C-5060 with PS-BLM1 Li-ion battery.

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In article <DKb*2i9yA@news.chiark.greenend.org.uk>, Theo <theom+news@chiark.greenend.org.uk> wrote: 
> If you have a variable current limit PSU I'd try to trickle charge the
> battery.  Set the PSU to 7.6V (3.8v per cell) with the current limit at say
> 100mA.  Apply to the + and - terminals of the battery.  Watch the voltage
> across the battery rise.  It should rise rapidly and then the rise should
> slow down around 7V and gradually rise from there.  This means it's taking
> charge and is likely healthy.

Don't have a variable current limit PSU but have a varistat and wonder 
about getting the charger and trickle charging with the varistat.  
Connect through an ammeter and watch while increasing the AC slowly.  
May also be a way to connect a voltmeter across the charger output 
while the battery is in.

> If it starts low but rises to 7.6V rapidly the battery has lost capacity; if
> it never rises then something has gone short circuit and it's scrap.
> 
> Keep an eye on it and feel it regularly for anything overheating.  As two
> cells in series it's riskier than a single cell because one going short
> could cause the other to become overcharged - I might be tempted to do this
> outside in case of fire.

Thanks for the explanation.

Yes, will work outdoors and watch temperature.

Thx,              ... P.

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Thread

Olympus C-5060 with PS-BLM1 Li-ion battery. peter@easthope.ca - 2026-02-12 08:56 -0700
  Re: Olympus C-5060 with PS-BLM1 Li-ion battery. Jeff Liebermann <jeffl@cruzio.com> - 2026-02-12 12:41 -0800
    Re: Olympus C-5060 with PS-BLM1 Li-ion battery. Theo <theom+news@chiark.greenend.org.uk> - 2026-02-13 15:52 +0000
      Re (2): Olympus C-5060 with PS-BLM1 Li-ion battery. peter@easthope.ca - 2026-02-13 12:15 -0700
    Re: Olympus C-5060 with PS-BLM1 Li-ion battery. peter@easthope.ca - 2026-02-13 11:54 -0700
      Re: Olympus C-5060 with PS-BLM1 Li-ion battery. NOSPAM.Ed.Vance@darkrealms.ca (Ed Vance) - Thu, 19 Feb 2026 22:27:56
    Re (2): Olympus C-5060 with PS-BLM1 Li-ion battery. peter@easthope.ca - 2026-03-04 12:20 -0700

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