[volt-nuts] Wanted - UK source of a replacement battery (type LX 1634) for HP 3457A 6.5 digit multimeter

[Electronics and Books]

I use these

https://www.conrad.nl/nl/eve-12-aa-axial-er14250-speciale-batterij-12-aa-axiaal-soldeerpin-lithium-36-v-1200-mah-1-stuks-650772.html


Met vriendelijke groeten
Regards
Frans

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On Sun, 1/24/16, Dr. David Kirkby (Kirkby Microwave Ltd) <drkirkby at kirkbymicrowave.co.uk> wrote:

 Subject: Re: [volt-nuts] Wanted - UK source of a replacement battery (type LX 1634) for HP 3457A 6.5 digit multimeter
 To: "Discussion of precise voltage measurement" <volt-nuts at febo.com>
 Cc: "hp_agilent_equipment at yahoogroups.com" <hp_agilent_equipment at yahoogroups.com>
 Date: Sunday, January 24, 2016, 11:08 PM
 
 On 24 January 2016 at
 21:24, Poul-Henning Kamp <phk at phk.freebsd.dk>
 wrote:
 
 > --------
 > In message <
 >
 CANX10hADbw1u9eJC8_ZgsK94k8Az8vzG4oSe+XnGfWRALi0B0w at mail.gmail.com>
 > , "Dr. David Kirkby (Kirkby Microwave
 Ltd)" writes:
 >
 >
 >Opening the meter up, I see the PCB shows "BT
 601". There's no name on the
 >
 >battery I can see, but the type number of LX 1634. The
 voltage measured on
 > >my 4.5 digit
 handheld DVM is 3.03 V. Googling around
 >
 > My guess is that this
 is a 3.6V Lithium-Thionyl battery, and if it is
 > only 3.03V now, you're very likely
 tethering right on the brink.
 >
 > The most reputable vendor in this space is
 Tadiran, and they charge
 >
 accordingly.
 >
 
 
 The post by Glenn (WB4UIV) in
 the link
 
 https://groups.yahoo.com/neo/groups/hp_agilent_equipment/conversations/topics/48964
 
 does say that it is
 Lithium-manganese dioxide (Li-MnO2). That information
 was apparently taken from the battery
 manufacturer's web site. So I don't
 think it is a Lithium Thionyl Chloride cell,
 although I'm very tempted to
 fit one, as
 I can get one easy enough and I can't see the extra
 voltage
 would do any harm given the SRAM is
 5 V. The SRAM actually gets about 4.8 V
 when
 on mains, so even a fresh Lithium Thionyl Chloride cell,
 which would
 be more than 3.6 V off load,
 would not be too much for the SRAM. So I think
 I am safe for now, but given the cell is at
 least 11 years old (probably
 much older), it
 is living on borrowed time.
 
 Dave
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