Spotmatic battery

alwaysjerricky · 06-15-2015, 06:47 AM

I know there are a few topics regarding this but i still don't quite understand which battery is suitable for the spotmatic without any rubber accessory or anything.
Will the Lr41 battery be able to fit inside without any other thing supporting it? Thanks!

Is it true that only silver oxide batteries are able to work with it? How about alkaline batteries?
I'm using the Spotmatic SP versions btw.

Last edited by alwaysjerricky; 06-15-2015 at 07:11 AM.

stingx · 06-15-2015, 08:27 AM

Wein 1.35 V Zinc-Air Battery

**stevebrot** · 06-15-2015, 11:53 AM

Originally posted by alwaysjerricky

I know there are a few topics regarding this but i still don't quite understand which battery is suitable for the spotmatic without any rubber accessory or anything.

Energizer E387S or S400PX or equivalent.

Originally posted by stingx

Wein 1.35 V Zinc-Air Battery

Not really needed. The Spotmatic is not voltage dependent at most light levels. Readily available silver cells work just fine.

Steve

alwaysjerricky · 06-15-2015, 05:24 PM

Originally posted by stevebrot

Energizer E387S or S400PX or equivalent.

Not really needed. The Spotmatic is not voltage dependent at most light levels. Readily available silver cells work just fine.

Steve

I see. How about alkaline batteries? Will they work too?

**stevebrot** · 06-16-2015, 11:06 AM

Originally posted by alwaysjerricky

I see. How about alkaline batteries? Will they work too?

They will work, but live span is poor.

Steve

alwaysjerricky · 06-16-2015, 05:29 PM

Originally posted by stevebrot

They will work, but live span is poor.

Steve

I see. Thansk for the info Steve!

**fwcetus** · 06-16-2015, 09:13 PM

Silvers (though they cost a bit more than alkalines, and are sometimes a bit harder to find) are the best, since they have a fairly steady voltage as they are being depleted (until they finally "drop dead", so to speak). [I think they might have a better shelf life, too.]

Alkalines are cheaper and easier to find, but their voltage starts dropping early on (although this is not too much of a problem with Spotmatic circuitry, which is pretty tolerant of voltage changes).

Wein batteries are expensive, relatively hard to find, and don't last too long either.

My "bottom line" = go for the silvers if possible, but alkalines are OK if not.

[Or, use Wein cells if you're a bit of a masochist.]

Fiddler · 06-16-2015, 09:39 PM

I get mine here : $10.99 Free Shipping for 10 Energizer 387S

http://stores.ebay.com/mta-trading-inc?_trksid=p2047675.l2563

arnold · 06-21-2015, 01:05 AM

Originally posted by alwaysjerricky

I know there are a few topics regarding this but i still don't quite understand which battery is suitable for the spotmatic without any rubber accessory or anything.
Will the Lr41 battery be able to fit inside without any other thing supporting it? Thanks!

Is it true that only silver oxide batteries are able to work with it? How about alkaline batteries?
I'm using the Spotmatic SP versions btw.

Yes, the LR 41 fits OK. Use a simple 'O' ring if you wish a tighter fit. All worked fine for me.

**rayallen** · 06-21-2015, 01:45 AM

You will find all the information you need here:

https://www.pentaxforums.com/forums/8-pentax-film-slr-discussion/285147-spotm...ml#post3108278

titrisol · 06-22-2015, 05:30 AM

PS, youmay have to pry the bottom contact up a little bit to ensure contact of the battery with the lid
do it carefully

06-15-2015, 06:47 AM	#1
alwaysjerricky Senior Member Join Date: Dec 2013 Posts: 109	Spotmatic battery I know there are a few topics regarding this but i still don't quite understand which battery is suitable for the spotmatic without any rubber accessory or anything. Will the Lr41 battery be able to fit inside without any other thing supporting it? Thanks! Is it true that only silver oxide batteries are able to work with it? How about alkaline batteries? I'm using the Spotmatic SP versions btw. Last edited by alwaysjerricky; 06-15-2015 at 07:11 AM.

06-15-2015, 11:53 AM	#3
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 39,241	Originally posted by alwaysjerricky I know there are a few topics regarding this but i still don't quite understand which battery is suitable for the spotmatic without any rubber accessory or anything. Energizer E387S or S400PX or equivalent. Originally posted by stingx Wein 1.35 V Zinc-Air Battery Not really needed. The Spotmatic is not voltage dependent at most light levels. Readily available silver cells work just fine. Steve Last edited by stevebrot; 06-15-2015 at 12:03 PM.

06-16-2015, 09:13 PM	#7
fwcetus Loyal Site Supporter Join Date: Sep 2006 Location: New England Photos: Gallery \| Albums Posts: 1,286	Silvers (though they cost a bit more than alkalines, and are sometimes a bit harder to find) are the best, since they have a fairly steady voltage as they are being depleted (until they finally "drop dead", so to speak). [I think they might have a better shelf life, too.] Alkalines are cheaper and easier to find, but their voltage starts dropping early on (although this is not too much of a problem with Spotmatic circuitry, which is pretty tolerant of voltage changes). Wein batteries are expensive, relatively hard to find, and don't last too long either. My "bottom line" = go for the silvers if possible, but alkalines are OK if not. [Or, use Wein cells if you're a bit of a masochist.] Last edited by fwcetus; 06-16-2015 at 09:19 PM.

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06-15-2015, 08:27 AM	#2
stingx Junior Member Join Date: Apr 2015 Posts: 33	Wein 1.35 V Zinc-Air Battery

06-15-2015, 05:24 PM	#4
alwaysjerricky Senior Member Join Date: Dec 2013 Posts: 109 Original Poster	Originally posted by stevebrot Energizer E387S or S400PX or equivalent. Not really needed. The Spotmatic is not voltage dependent at most light levels. Readily available silver cells work just fine. Steve I see. How about alkaline batteries? Will they work too?

06-16-2015, 11:06 AM	#5
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 39,241	Originally posted by alwaysjerricky I see. How about alkaline batteries? Will they work too? They will work, but live span is poor. Steve

06-16-2015, 05:29 PM	#6
alwaysjerricky Senior Member Join Date: Dec 2013 Posts: 109 Original Poster	Originally posted by stevebrot They will work, but live span is poor. Steve I see. Thansk for the info Steve!

06-16-2015, 09:39 PM	#8
Fiddler Forum Member Join Date: Jan 2015 Location: Arizona Posts: 57	I get mine here : $10.99 Free Shipping for 10 Energizer 387S http://stores.ebay.com/mta-trading-inc?_trksid=p2047675.l2563

06-21-2015, 01:05 AM	#9
arnold Pentaxian Join Date: Aug 2012 Location: Queensland Photos: Gallery \| Albums Posts: 3,870	Originally posted by alwaysjerricky I know there are a few topics regarding this but i still don't quite understand which battery is suitable for the spotmatic without any rubber accessory or anything. Will the Lr41 battery be able to fit inside without any other thing supporting it? Thanks! Is it true that only silver oxide batteries are able to work with it? How about alkaline batteries? I'm using the Spotmatic SP versions btw. Yes, the LR 41 fits OK. Use a simple 'O' ring if you wish a tighter fit. All worked fine for me.

06-21-2015, 01:45 AM	#10
rayallen Site Supporter Join Date: Jul 2007 Location: Forresters Beach, Central Coast, NSW, Australia Photos: Gallery \| Albums Posts: 2,760	You will find all the information you need here: https://www.pentaxforums.com/forums/8-pentax-film-slr-discussion/285147-spotm...ml#post3108278

06-22-2015, 05:30 AM	#11
titrisol Veteran Member Join Date: Dec 2007 Location: In the most populated state... state of denial Photos: Gallery \| Albums Posts: 1,260	PS, youmay have to pry the bottom contact up a little bit to ensure contact of the battery with the lid do it carefully

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