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12-16-2015, 08:28 AM   #16
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QuoteOriginally posted by RockvilleBob Quote
The past few outings in about 35F to 45F outings I have gotten very short battery life from Washabi. I have started taking 4 or 5 batteries for a three hour outing. Do batteries loose their ability to maintain a charge in cool weather as the batteries age? I feel I got longer life last year. I am thinking of trying the Watson batteries from B&H. Does anyone have experience comparing the Washabi versus the Watson batteries versus Pentax batteries, especially in cold weather.
My guess is that Pentax buys these from one of the companies that provide off brand batteries and do not manufacture their own batteries.

I have also used a pouch with a hot hands packet to keep the batteries warm during my outings.

Any help appreciated.
this was the biggest negative I found on my Wasabi batteries. They just didn't hold a charge in cold weather or, high load (lots of video/live view) situations compared with the OEM batteries.

12-16-2015, 09:21 AM   #17
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QuoteOriginally posted by Docrwm Quote
The official battery for the K-7/5/5II/5IIs, K-01, and 645D is the D-Li90 and there are now two versions of that battery. The differences have been discussed here and involve the addtion of another contact for safety and battery regulation issues. The focus of this post is on the pricing difference between the two. The new one is listing as $9.05 more at B&H.

D-LI90(E) Lithium-Ion Battery (7.2V, 1860mAh) <- New Battery
  • Compatible with K-5, K-5II, K-5IIs, K-7, K-01 and 645D Digital Cameras
  • B&H # PEDLI90E
  • Mfr # 39993
  • You Pay: $49.00
<- Old Battery with 3 of 4 contacts

D-LI90 Rechargeable Lithium-Ion Battery Pack (7.2V, 1860mAh)
Fits Pentax K-5, K-5II, K-5IIs, K-7, K-01, 645D Cameras
  • B&H # PEDL190
  • Mfr # 39830
  • You Pay: $39.95
I know this is a very old post; however, I see only one D-LI90 on B&H, and it looks exactly like my K3 battery with the 3 contacts! So where is this newer battery with 4 contacts?

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