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Re: [OM] Replacements for Oly BLM-1 Batteries

Subject: Re: [OM] Replacements for Oly BLM-1 Batteries
From: "Wiliam Wagenaar" <wiliam@xxxxxxxxx>
Date: Tue, 24 Nov 2009 19:43:05 +0100
Thanks for the warnicg, Chuck.

I'll have a look around for other, more reputable, batteries. In the
meantime I'll be carefull not to overcharge the battery.

Wiliam

> -----Oorspronkelijk bericht-----
> Van: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx] 
> Verzonden: dinsdag 24 november 2009 17:37
> Aan: Olympus Camera Discussion
> Onderwerp: Re: [OM] Replacements for Oly BLM-1 Batteries
> 
> 
> The fact that a lithium-ion battery "works" under normal 
> circumstances 
> should be no consolation.  The problems come about if the 
> thing should 
> get short circuited or overcharged (as might happen when 
> leaving it in 
> the charger overnight) From the review:
> --------------------------------------------------------------------
> On the discharge test the control board battery voltage 
> monitor IC did 
> eventually cut the pack off completely but it clearly had 
> some problems 
> switching the pack off as the expanded discharge graph shows. It 
> eventually operated at about 3.65 volts. This is quite low, and gives 
> questionable protection for the pack. As with many lowest-cost packs 
> there is no polyfuse for protection against short circuits, a 
> lamentable 
> omission. The charge control device is not a proper 
> thermistor but just 
> a resistor on the end-mounted PCB.
> --------------------------------------------------------------------
> In other words a potential fire or explosion hazard.  There's 
> a reason 
> why reputable lithium ion batteries don't sell for $5.
> 
> Chuck Norcutt
> 
> 
> wiliam Wagenaar wrote:
> > Under "Avoid at all costs" I see the e-film battery mentioned.
> > 
> > I received one with my E-1 almost 5 years ago and it still 
> functiond 
> > flawlessly although I feel it has a bit less capacity than the 
> > original battery. I sometimes leave it in the charger overnight and 
> > have not had any problems so far.
> > 
> > Just my experience.
> > 
> > Wiliam
> > ----- Oorspronkelijk bericht -----
> > Van: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
> > Aan: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> > Verzonden: Maandag 23 november 2009 23:35:26 GMT +01:00 Amsterdam / 
> > Berlijn / Bern / Rome / Stockholm / Wenen
> > Onderwerp: Re: [OM] Replacements for Oly BLM-1 Batteries
> > 
> > Martin has it right according to this page: 
> > <http://t5r.pwp.blueyonder.co.uk/e1/clonetests.htm>
> > The data is getting a little long in the tooth and the brands are 
> > what's
> > available in the UK and not necessarily Oz.  But it's an 
> excellent read 
> > even if you can't get your hands on the recommended brands. 
>  There are 
> > some warnings there about what's likely a fire/explosion 
> hazard due to 
> > substandard construction.
> > 
> >  From the summary section
> > ------------------------------------------
> > Overall winner - UNiROSS VB104295
> > 
> > Second place - Energizer OM-1
> > Third place - Olympus BLM-1
> > Fourth Place - Hahnel HL-M1 (note 1, 2)
> > 
> > Best capacity - UNiROSS VB104295
> > Best value for money - 7DayShop PS-BLM1
> > 
> > AVOID AT ALL COSTS
> > 
> > Sterling Tek WT-BLM1 (note 2)
> > 'WinTop' PS-BLM1 'Olympus' clone
> > e-Film (Delkin) PS-BLM1
> > 'Cb' BLM1 clone
> > ------------------------------------------
> > 
> > AFAIK, UNiROSS isn't sold in the US.  But my second battery 
> for my 5D 
> > is
> > an Energizer CR-590 which I've owned for over 3 years and 
> it seems to be 
> > going as strong as the Canon BP-511A that came with the 
> camera.  They 
> > get roughly equal usage.  But there isn't a great savings.  The 
> > Energizer is about $35 and the Canon original at B&H is about $50.
> > 
> > Chuck Norcutt
> > 
> > 
> > 
> > Martyn Smoothy wrote:
> >> Uniross - bought one years ago when I first got the e-1 - 
> at least as
> >> good as the oly original.
> >> Not sure where you could get one these days...
> >>
> >> Martyn Smoothy
> >>
> >>
> >>
> >> Wayne Harridge wrote:
> >>> I have a few BLM-1 clones purchased from China/Hong Kong which do 
> >>> not have anything close to the capacity of the original Oly 
> >>> batteries which came with cameras.
> >>>
> >>> I'm looking for some good value replacements - any 
> recommendations ?
> >>>
> >>> ...Wayne
> >>>
> >>> Wayne Harridge
> >>>
> >>> http://lrh.structuregraphs.com
> >>>   
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