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08-23-2016, 04:51 AM - 1 Like   #1
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Lack of AA adaptor

Went on a five day family vacation with my K-50 and left all my battery chargers at home. Both the LiOn battery one and rechargeable AA nimh battery charger. Boy I'm glad that my camera takes alkaline batteries.
Can't really understand why Pentax left this out of later models including k-70

08-23-2016, 05:41 AM   #2
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QuoteOriginally posted by TzalamChadash Quote
Can't really understand why Pentax left this out of later models including k-70
It's a handy feature, for sure, but I suspect it's a matter of available space in the newer camera bodies. Four AA batteries take up more room than the D-LI90 in a K-3 - and a lot more room than the D-LI109 in a K-S2
08-23-2016, 05:53 AM   #3
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Voltage is also a factor to considet. i had a k100d that needed 4 batteries, but the voltage required was 6v, and four rechargeable batteries add up to 4.8v, and the body worked slower than using li ion batteries ( or so i heard because i only used eneloops)
the voltage for the k3 and probably ks-2 is 7.4 volts (the battery grip houses 6 batteries) so a lot of space is needed
08-23-2016, 06:31 AM   #4
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(so far as I know) Pentax was the last maker to have an AA- capability in a DSLR, by several years. It was getting hard to find a point-n-shoot that used AAs seven years ago. I won't argue about the usefulness of AA batteries or whether there is a conspiracy to sell batteries instead of cameras, but I think if the demand for AA really was there, the makers would respond. I'm guessing the feedback Ricoh was getting was that AA battery compatibility wasn't as important as size/weight/convenience. It probably didn't help that hardly anyone was buying the genuine Pentax AA adapter instead of cheap copies.

08-23-2016, 06:42 AM   #5
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QuoteOriginally posted by TzalamChadash Quote
Went on a five day family vacation with my K-50 and left all my battery chargers at home. Both the LiOn battery one and rechargeable AA nimh battery charger. Boy I'm glad that my camera takes alkaline batteries.
Can't really understand why Pentax left this out of later models including k-70
I basically agree - I've been paranoid about batteries for about thirty years now, ever since the first outing my wife and I took with my Super Program, and I spent part of the day looking for someone who sold those tiny button batteries that it ate like candy. The ability to use AA batteries, readily available at any convenience store, was a plus in my mind when I got my K-30. On the other hand, I'm coming to value smaller cameras. I may buy a K-70 soon, and if I do so, I'll do the same thing I've done for my Q-7 - namely get a Watson plate for it, and try to remember to have the plates and the charger live in my car.
08-23-2016, 07:13 AM   #6
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Besides the issue of voltages for lithium vs. alkaline vs. NiMH is the issue of internal resistance and peak power. Alkaline batteries are much worse at delivering high current (e.g., if SR + live view + autofocus + storing the last image are all happening at once) -- try to pull too much power from a set of store-bought AAs and the voltage plummets and then the camera crashes.
08-23-2016, 08:06 AM   #7
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QuoteOriginally posted by reh321 Quote
I basically agree - I've been paranoid about batteries for about thirty years now, ever since the first outing my wife and I took with my Super Program, and I spent part of the day looking for someone who sold those tiny button batteries that it ate like candy.
I understand the paranoia (always kept 2 SR44 in the bag), but am surprised your Super Program was a battery eater. I don't use mine that often, but have been using the same batteries for several years. Were you using alkaline or silver cells?

Sorry for going seriously off-topic.


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08-23-2016, 08:07 AM   #8
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Thanks!
All good responses.
Regarding size - going down to AAA could have helped in that regard.
Good idea about keeping a second charger in the car. Makes sense.

08-23-2016, 08:39 AM   #9
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Even back in the 80s I had no problem finding SR44/357 batteries. There were camera stores everywhere and all the chain drug stores like Sav-ons or Thrifties carried them. Now SR44 are so common everybody carries them.

AAA batteries don't have the storage capacity and amperage to drive the motors and solenoids in DSLRs for any worthwhile amount of time.
08-23-2016, 09:18 AM   #10
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QuoteOriginally posted by Not a Number Quote
Even back in the 80s I had no problem finding SR44/357 batteries. There were camera stores everywhere and all the chain drug stores like Sav-ons or Thrifties carried them. Now SR44 are so common everybody carries them.

AAA batteries don't have the storage capacity and amperage to drive the motors and solenoids in DSLRs for any worthwhile amount of time.
Worthwhile amount of time is very subjective - especially when one has no power at all.
08-23-2016, 11:20 AM   #11
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QuoteOriginally posted by stevebrot Quote
I understand the paranoia (always kept 2 SR44 in the bag), but am surprised your Super Program was a battery eater. I don't use mine that often, but have been using the same batteries for several years. Were you using alkaline or silver cells?
I used silver when I could get them.

QuoteOriginally posted by Not a Number Quote
Even back in the 80s I had no problem finding SR44/357 batteries. There were camera stores everywhere and all the chain drug stores like Sav-ons or Thrifties carried them. Now SR44 are so common everybody carries them..
Maybe in Calif. Around here, no one carried "44" cells. When I read the package, I can usually find something compatible today, but the price is typically $3 or more per battery.
08-23-2016, 11:27 AM   #12
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Yeah, supporting AAs really does require more space if you compare the grips / slots on the K-50 and K-70. My recommendation would be to get multiple rechargeable batteries- even cheap ones will suffice as an emergency option.

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08-23-2016, 11:28 AM - 1 Like   #13
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The K3 and K3II can run on AA batteries using the grip; so the option hasn't really been removed, just moved.
08-23-2016, 03:01 PM   #14
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QuoteOriginally posted by Adam Quote
Yeah, supporting AAs really does require more space if you compare the grips / slots on the K-50 and K-70. My recommendation would be to get multiple rechargeable batteries- even cheap ones will suffice as an emergency option.
Thanks. I have two sets of rechargeable AA nimh (long storage- which I forgot to recharge on empty) and two Pentax batteries (the lithium ion batteries don't hold their charge for too long). But I forgot to charge all the batteries before we left and I left all the chargers behind.
Only an alkaline battery adaptor can help in that situation
09-07-2016, 06:52 AM   #15
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QuoteOriginally posted by TzalamChadash Quote
Went on a five day family vacation with my K-50 and left all my battery chargers at home. Both the LiOn battery one and rechargeable AA nimh battery charger. Boy I'm glad that my camera takes alkaline batteries.
Can't really understand why Pentax left this out of later models including k-70
I miss the AA battery option also, especially when hiking and shooting in more remote areas where it is not possible to recharge the others.
GR
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