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03-13-2020, 06:27 PM   #1
Colin Mayer
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Pentax P30 battery

Found my old Pentax P30 film camera at the back of the cupboard. Can anyone tell me what type of batter (button type) it takes?

03-13-2020, 07:12 PM - 1 Like   #2
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QuoteOriginally posted by Colin Mayer Quote
Found my old Pentax P30 film camera at the back of the cupboard. Can anyone tell me what type of batter (button type) it takes?
Welcome to Pentax Forums Colin.

It takes two S76 batteries. They are no longer available, but the EverReady SMC357 looks like a viable alternative.

But.

The P30 only has Program and Manual exposure modes, and the ISO can only be set by the DX coding on the film canister.

I'm not sure if currently available 35mm film has the DX barcode on the canister. Perhaps another member more familiar with current film will weigh in.

Read more at: Pentax P3 / P30 - Pentax Manual Focus Film SLRs - Pentax Camera Reviews and Specifications
03-13-2020, 08:12 PM   #3
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The P30 takes two S76 silver oxide button cells. These are still available, though the same size and specification and size are also sold as SR44, 357, and EPX76. Be sure you are getting the longer-lasting silver oxide cells.

As for DX-encoded film canisters, I have recently-purchased rolls of Kodak Gold 200 that are DX and listings for consumer-grade Kodak and Fujifilm color negative films at B&H show canisters with prominent DX logos. Beyond that, I can't say for sure being that I have very little recent film purchases in 35mm. Probably the easiest way to know is to ask the store directly whether the films they sell are DX encoded.


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03-13-2020, 08:27 PM   #4
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there is another option to find DX coded rolls of film:

QuoteQuote:
See DX coded rolls of film
DX coded rolls of film - Google Shopping

03-14-2020, 04:26 AM   #5
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All Kodak, Fuji and Ilford films are DX coded, some of the recently introduced ranges may not be. The biggest problem is not being able to override the ISO set by the DX coding, should you want to do that (after market DX stickers were available back in the day).
03-14-2020, 07:31 AM   #6
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I use the 357 batteries. Available at Walmart, Best Buy, most grocery stores etc.
03-14-2020, 08:01 AM   #7
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QuoteOriginally posted by stevebrot Quote
The P30 takes two S76 silver oxide button cells. These are still available, though the same size and specification and size are also sold as SR44, 357, and EPX76. Be sure you are getting the longer-lasting silver oxide cells.. . .

Steve
I use Duracell 303/357/76 1.5V. silver oxide 3 pack

replacement for SR44, SR44W, EPX76

as was said widely available

https://www.google.com/search?q=Duracell+303/357/76+1.5V.+silver+oxide+3+pac...tUQsxh6BAgNECw
03-14-2020, 10:30 AM   #8
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LR44 batteries are also available,and drastically less expensive. Just donít leave them in the camera more than a year and you should be fine.

The DX coding can be scratched into the side of pretty much any non-DX coded film. Just use the blade of a utility knife perpendicular to the cartridge. There are sources online for the code pattern. You only need to worry about the ISO pattern, the P30 doesnít even have the pins for the other stuff.

03-14-2020, 01:05 PM   #9
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QuoteOriginally posted by Steve Beswick Quote
LR44 batteries are also available,and drastically less expensive.
The trade-off, other than less than half the life, is significant voltage sag towards end-of-life. That is why Pentax recommended the silver-oxide S76.


Steve

Last edited by stevebrot; 03-14-2020 at 08:28 PM. Reason: grammar
03-14-2020, 06:49 PM   #10
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You can use SR44 batteries. They're silver-oxide type, while even though priced a smidge more than the aklaline type of batteries, they last longer.

Walmart has a 5-pack for $8: 5x Exell S76PX 1.55V Silver Oxide Battery 303 357 SR44 V357 GS13 FAST USA SHIP - Walmart.com - Walmart.com
03-14-2020, 10:01 PM   #11
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QuoteOriginally posted by disconnekt Quote
You can use SR44 batteries. They're silver-oxide type, while even though priced a smidge more than the aklaline type of batteries, they last longer.

Walmart has a 5-pack for $8: 5x Exell S76PX 1.55V Silver Oxide Battery 303 357 SR44 V357 GS13 FAST USA SHIP - Walmart.com - Walmart.com
I used to run a college photo lab. Here is what I learned about sr44/s76/etc batteries:

1. They are not just a little more expensive, they are a LOT more expensive. Example - LiCB 40 Pack LR44 AG13 357 303 SR44 Batteries 1.5V Button Coin Cell Battery amazon.com: LiCB 40 Pack LR44 AG13 357 303 SR44 Batteries 1.5V Button Coin Cell Battery: Home Audio & Theater?tag=pentaxforums-20& thatís 40 alkalines for $7. At that price, most of them will go bad before they get used. The same would be true if they were silver versions.

Often you think you are ordering the silver versions and the alkaline version shows up. The online sellers often lie.

No Pentax ever cared about the voltage of the battery except when it was too low to run the camera. The meter will be accurate at any operational voltage.

The silver ones can and do just as good of a job of destroying your battery compartment.

With all of that considered, it is best to just set a calendar reminder every year to trash the set that is installed, and install new ones. if you are wearing out batteries faster than once a year, then just carry a spare set in your bag. Itís not like they take up a ton of space.
03-15-2020, 01:31 AM   #12
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Preparing your own DX labels is easier than scratching the film canisters. They can easily be made using paper, tin foil, a little glue and scissors. Use the wikipedia page to check what each part of the code means: DX encoding - Wikipedia
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