[TwoUptons]

I charge my iPhone 7 every night, whether it needs it or not.
By the end of a regular usage day, I'm down to about 30-40%.

One of my K-70 (main camera) batteries need to be recharged every ~3 days.
My K-5 is (unfortunately) not used very much since the K-70 came around and I'd guess a charge would last about a week.

The iPhone 7 is, IIRC, also involved in a class action lawsuit about battery capacity and power management.

I use my K-01 and K-1 batteries interchangeably, and the K-01's original battery just recently stopped holding a decent charge (7 years isn't bad...)
I've gone through several third-party batteries in the meantime, though I'm still ahead with those, as they are so much cheaper...

-Eric

[FozzFoster]

third-party batteries

I have only one experience with third-party batteries (that I had used regularly) and it was a Promaster D-LI109.
It held a similar charge as a Pentax version for a few months but now it's only good for about 2 hours.

[reh321]

I have only one experience with third-party batteries (that I had used regularly) and it was a Promaster D-LI109.
It held a similar charge as a Pentax version for a few months but now it's only good for about 2 hours.

I use my "Wasabi" and "Kastar" as much as my "Pentax" batteries, and so far I see no real difference.

[bhbrake]

My factory charger stays at home and I carry a Watson compact charger. I haven't noticed significant wear on my Pentax battery, but the Watson cells have degraded quickly. The USB C is a nice options to cut bulk at least.

[angerdan]

New informations about the new charger(s):

• 129€ price tag (converts into $153)
  Kit chargeur de batterie rapide K-BC177E
• Release possibly 30.11.2020
  POWER ADAPTER LADEKIT K-BC177E - RICOH IMAGING DEUTSCHLAND GmbH

Charging times comparision table:

K-BC90...=-.-400.mA @ 8.4V.= 5.3 h charging time ("up to 320 minutes", source: Pentax K-01 manual; "in about 390 minutes", source: ricoh-imaging.co.jp/english/products/k-1-2/accessories/index.html)
D-BC177 =.800? mA @ 8,4V = 4.5 h charging time (4.5 hours without the Pentax USB Type-C cable)
K-BC177 = 1500 mA @ 8,4V = 2.5 h charging time (1500mA, source: ricoh-imaging.eu/de_de/battery-charger-d-bc177-1#product-specifications)
AC-Ux..-.-= 1000 mA @ 5V....= 4.5 h charging time (1000mA, source: ricoh-imaging.co.jp/english/support/man-pdf/k-3-3.pdf#page=42)

The D-Li90 battery has 1.860 mAh at 7.2V = 13,392 Wh capacity.
With the "old" K-BC90 charger a complete charge can take 5.3 to 6.5 hours.
The K-BC177 consists of the D-KBC177 charger itself and the K-AC166 AC Adapter (5V@3A, 9V@3A and 12V@3A)

There are a couple of things one might add that contribute to poor battery performance. They include:

• Heavy AF use
• Long exposures...it takes energy to hold the mirror up
• MLU
• Live view
• Video shooting
• Interval shooting using the internal drive mode
• Excessive SD card writes (save, delete, format)
• Manual focus using live view
• Fiddling around with the camera that does not involve actual exposures
• Use at high or low temperature extremes

Some guy did measurements with his Canon 1Ds Mark II several years ago:

Current-.Function
800 mA....Release including shutter clamp
260 mA....Card writing with display active
260 mA....deleting pictures
230 mA....Card writing
220 mA....powering on
190 mA....Pressed shutter button
170 mA....Display active
053 mA....Standby
018 mA....powered off
018 mA....powered off with AC adapter attached
.0.2 mA....powered off with battery inserted
.0.2 mA....auomatically powered off with inserted battery

Source:
zoo-fotografie.de

[Kunzite]

New informations about the new charger(s):

• 129€ price tag (converts into $153)
  Kit chargeur de batterie rapide K-BC177E
• Release possibly 30.11.2020
  POWER ADAPTER LADEKIT K-BC177E - RICOH IMAGING DEUTSCHLAND GmbH

Something is weird - the K-BC177E is the D-BC177 plus the K-AC166 adapter, yet they're the same price. The separate charger should be 50 euro or so - and should offer fast charge with an USB-C power adaptor capable of Power Delivery.

[thibs]

New informations about the new charger(s):

• 129€ price tag (converts into $153)
  Kit chargeur de batterie rapide K-BC177E
• Release possibly 30.11.2020
  POWER ADAPTER LADEKIT K-BC177E - RICOH IMAGING DEUTSCHLAND GmbH

Charging times comparision table:

K-BC90...=-.-400.mA @ 8.4V.= 5.3 h charging time ("up to 320 minutes", source: Pentax K-01 manual; "in about 390 minutes", source: ricoh-imaging.co.jp/english/products/k-1-2/accessories/index.html)
D-BC177 =.800? mA @ 8,4V = 4.5 h charging time (4.5 hours without the Pentax USB Type-C cable)
K-BC177 = 1500 mA @ 8,4V = 2.5 h charging time (1500mA, source: ricoh-imaging.at/de/ladegeraete/group/33/body/overview/akku-ladeschale-dbc177.html)

The D-Li90 battery has 1.860 mAh at 7.2V = 13,392 Wh capacity.
With the "old" K-BC90 charger a complete charge can take 5.3 to 6.5 hours.


Some guy did measurements with his Canon 1Ds Mark II several years ago:

Current-.Function
800 mA...Release including shutter clamp
260 mA...Card writing with display active
260 mA...deleting pictures
230 mA...Card writing
220 mA...powering on
190 mA...Pressed shutter button
170 mA...Display active
053 mA...Standby
018 mA...powered off
018 mA...powered off with AC adapter attached
.0.2 mA...powered off with battery inserted
.0.2 mA...auomatically powered off with inserted battery

Source:
zoo-fotografie.de

Interesting info, thanks.

[angerdan]

Something is weird - the K-BC177E is the D-BC177 plus the K-AC166 adapter, yet they're the same price.
The separate charger should be 50 euro or so - and should offer fast charge with an USB-C power adaptor capable of Power Delivery.

No the K-BC177 is the D-BC177 including the new USB Type-C adapter. It has nothing to do with the old K-AC166 and is completely incompatible.
I already recognised the same price tag for different products. I guess it's a mistake from the shop and will be corrected once the item is in available.

[Kunzite]

No the K-BC177 is the D-BC177 including the new USB Type-C adapter. It has nothing to do with the old K-AC166 and is completely incompatible.
I already recognised the same price tag for different products. I guess it's a mistake from the shop and will be corrected once the item is in available.

The K-AC166 is the USB-C power adapter now used for the Ricoh GR III. It is not some old Pentax adapter.

The K-BC177 consist of the D-BC177 USB-C battery charger and the K-AC166 USB-C power adapter.

[angerdan]

The K-AC166 is the USB-C power adapter now used for the Ricoh GR III. It is not some old Pentax adapter.
The K-BC177 consist of the D-BC177 USB-C battery charger and the K-AC166 USB-C power adapter.

Thanks for the correct informations 📷🔋🔌

[Kunzite]

Thanks for the correct informations 📷🔋🔌

You're welcome.
Those names are confusing...

[stevebrot]

The K-AC166 is the USB-C power adapter now used for the Ricoh GR III. It is not some old Pentax adapter.

The K-BC177 consist of the D-BC177 USB-C battery charger and the K-AC166 USB-C power adapter.

Are you sure about this?

Below is the K-BC177 (photo from Ricoh Japan Web site):



Note that the wall cord and that the unit is labeled D-AC166. The K-AC166 has a built-in (flip-down) plug...no cord on the AC side.


Steve

[Kunzite]

Are you sure about this?

Below is the K-BC177 (photo from Ricoh Japan Web site):



Note that the wall cord and that the unit is labeled D-AC166. The K-AC166 has a built-in (flip-down) plug...no cord on the AC side.


Steve

I'm not seeing any image (but I looked on the Ricoh and other sites).
The actual power brick is labeled D-AC166. "K" seems to come from "kit", and that would be the power brick plus the AC power cord. The USB-C cable is fixed thus it's part of the D-AC166.

http://www.ricoh-imaging.co.jp/english/products/gr-3/accessories/index.html

L.E. Yaotomi has better images with the charger/kit:
https://www.yaotomi.co.jp/blog/used/2020/08/-pentax-k-1-mark-ii-silver-edition-1000.html
- but those are with the K-BC177, so they're including the battery charger.

[reh321]

I'm not seeing any image (but I looked on the Ricoh and other sites).
The actual power brick is labeled D-AC166. "K" seems to come from "kit", and that would be the power brick plus the AC power cord. The USB-C cable is fixed thus it's part of the D-AC166.

Accessories?GR III | RICOH IMAGING

When I rode the train from Chicago IL to San Diego CA just about four years ago, part of my space savings was in using the same USB power source for my cell phone and Q-7 battery chargers.
It would be interesting if you could either use the D-AC166 for your cell phone or use your cell phone power source for the Pentax charger.

[stevebrot]

I'm not seeing any image (but I looked on the Ricoh and other sites).
The actual power brick is labeled D-AC166. "K" seems to come from "kit", and that would be the power brick plus the AC power cord. The USB-C cable is fixed thus it's part of the D-AC166.

Accessories?GR III | RICOH IMAGING

Strange that the image does not show. I suspect because the URL is HTTP and would result in mixed secure/non-secure content for the page. Try the URL below pasted directly into a new browser window.

Code:

http://www.ricoh-imaging.co.jp/english/products/accessory/battery/img/bod_img_10.jpg

Yep, the actual model is as we both noted and the USB-C cable is fixed to the D-AC166, but not to the USB-C charger part. I had to go to the GIII manual to figure this puzzle out and as noted, D-AC166 is the model number for the GIII AC adapter accessory. The K-AC166 remains a bit of a puzzle. The brick itself is labeled D-AC166 and on the Ricoh Japan site, the K-AC166 is explicitly bundled with a cord. However, on the Ricoh U.S. site and on Adorama the model is K-AC166U and is described as a "Wall Unit to Charge Lithium-ion Battery" with no mention of cord. I was assuming that to mean a flip-down plug. BTW...Adorama sells it for only $20 USD.

The question might be whether the D-BC177 when paired with a D-AC166 will fast charge...the truth is out there somewhere...


Steve