[time-nuts] HP 5334A battery

Scott McGrath scmcgrath at gmail.com
Thu May 3 18:11:56 UTC 2012


Key here is if battery is ni-cd it implies a charging circuit and using alkaline or lithium batteries may explode If charged 

On the hp instruments which I have rehabbed from that era most of them used nicads with a charger circuit so best advice is replace like with like

Sent from my iPhone

On May 3, 2012, at 12:40 PM, Brooke Clarke <brooke at pacific.net> wrote:

> Hi:
> 
> Shelf life is the key spec for memory backup batteries.  The worst possible type are rechargeable which go dead in a few months.
> Next best are primary batteries where Alkaline (a few years) is good, but newer chemistries like Lithium primary have >> 10 year shelf life.
> So a computer memory backup battery is the best choice.  The largest one that fits the space will have much more capacity than the old battery because batteries have improved a lot in the past 10 years.
> http://www.prc68.com/I/batt.shtml#CC
> 
> Have Fun,
> 
> Brooke Clarke
> http://www.PRC68.com
> http://www.end2partygovernment.com/Clarke4Congress.html
> 
> 
> shalimr9 at gmail.com wrote:
>> The best way is to buy a rechargeable cell pack for cordless phones. These are typically made with 3 small NiCad so that they don't mind trickle charging and are already safely packaged in shrink tubing with two leads and a connector. When the local Lowe's went out of the phone distribution market, they sold many of those small battery packs for $1 or $2 and I got a few that I have been using for that purpose.
>> 
>> Didier KO4BB
>> 
>> ------Original Message------
>> From: iovane at inwind.it
>> Sender: time-nuts-bounces at febo.com
>> To: Time-Nuts
>> ReplyTo: iovane at inwind.it
>> ReplyTo: Time-Nuts
>> Subject: Re: [time-nuts] HP 5334A battery
>> Sent: May 3, 2012 4:24 AM
>> 
>>> alanh137 at gmail.com wrote:
>>> 
>>> My 5334A Service Manual for SERIAL NUMBER PREFIX: 2426A lists the following
>>> battery;
>>> 
>>> Reference Designation - BT1
>>> HP Part Number - 1420-0268
>>> Description - Battery 3.6V .065A-HR NI-CD
>>> Mfr Code - 28480 (which is Hewlett-Packard)
>>> Mfr Part Number - 1420-0268
>>> 
>>> I haven't opened my unit up to make any checks against this data.  Hope
>>> this helps.
>> Sure, thank you. I think that the fastest way to replace it would be to
>> assemble three ordinary 1.2V cells.
>> Regards,
>> Antonio I8IOV
>> 
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>> 
>> Sent from my BlackBerry Wireless thingy while I do other things...
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> 
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