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07-16-2016, 01:54 PM - 1 Like   #1
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Battery cross compatibility - Pentax D-LI90 and Panasonic BLF19

I might be flying close to the sun here, but I notice that the Panasonic BLF19 (BLF19PP) and the D-LI90 ( like for the K-5 ) are essentially the same battery!

The contacts are the same +,T,-, except the Panasonic one gets a 4th contact marked (D).
The Pentax FACTORY D-LI90 has that 4th contact blocked off!

Both are 7.2V and 1860 mAh and it worked good in my factory battery grip of my K-5 (OG).

However, the charger locking slots found on the bottom/sides are different, and thus the batteries require different charging docks UNLESS you extend out the panasonic locking slot.
In the side pictures, the panasonic is the one that is on the left, and you can see the slots are significantly shorter.

You could also use the panasonic charger if you grind down the second locking nub ( the one furthest from the electrical contacts ) on the charger.
However I haven't modified either of my batteries or charger, so I can't say for certain yet.


Last edited by shootfreeordiehard; 07-16-2016 at 02:26 PM. Reason: Update found non-compatibility with each other's chargers, and Steve's comment re: K10d
07-16-2016, 02:10 PM - 1 Like   #2
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QuoteOriginally posted by shootfreeordiehard Quote
I might be flying close to the sun here, but I notice that the Panasonic BLF19 (BLF19PP) and the D-LI90 ( like for K-10D and K-5 ) are essentially the same battery!
You may be flying close to the sun, but since you already use the BLF19 in your K-5 grip, you are now the official test user. Please inform us of any fires/explosions or if you brick the camera. (Just joking )

BTW...for accuracy's sake, the K10D uses a D-LI50 battery. The D-LI90 was first used in the K-7.


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07-16-2016, 02:37 PM   #3
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QuoteOriginally posted by shootfreeordiehard Quote
The Pentax FACTORY D-LI90 has that 4th contact blocked off!
The current D-Li90E does have the 4th contact. So you might be right, could be the same battery vendor.

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07-16-2016, 04:00 PM   #4
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QuoteOriginally posted by Adam Quote
The current D-Li90E does have the 4th contact. So you might be right, could be the same battery vendor.
D-LI90E?? What is that?

07-16-2016, 08:09 PM - 1 Like   #5
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QuoteOriginally posted by shaolen Quote
D-LI90E?? What is that?
My guess is that it's an "enhanced" version of the original D-Li90, launched around the time of the K-5 II to conform to the latest health & safety standards. It ships will all current Pentax bodies but is still labeled D-Li90 (no E).

But I was wrong, even that version of the battery has the 4th contact covered.

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5 Days Ago   #6
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Great find!

Looks like great chargers could be used for Pentax:
Hähnel PROCUBE2 - 3D printed adapter for Pentax D-Li90 - PentaxForums.com

USB-Charger for BLF19 from Panasonic:
DMW-BTC13 LUMIX Camera Batteries - Panasonic UK & Ireland
DMW-BTC13EB Battery Charger- Panasonic Direct

Here are some identical pictures shot with the same perspective of the D-LI90 and BLF19:
D-LI90 front
BLF19 front

D-LI90 side
BLF19 side

Last edited by angerdan; 5 Days Ago at 11:56 AM.
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