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Watson D-Li90 Lithium-Ion Battery Pack (7.4V, 1800mAh)

BH #WADLI90 • MFR #B-3704
74 reviews
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Watson D-Li90 Lithium-Ion Battery Pack (7.4V, 1800mAh)
Key Features
  • Replacement for Pentax D-Li90 Battery
The Watson D-Li90 Lithium-Ion Battery Pack works with the same cameras as the Pentax D-Li90. This replacement battery pack features a capacity of 1800mAh, 7.4V of output power and 13.32 watt-hours. Small and lightweight, lithium-ion batteries can be charged or discharged at any time without developing memory effect.
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Watson D-LI90 Overview

The Watson D-Li90 Lithium-Ion Battery Pack works with the same cameras as the Pentax D-Li90. This replacement battery pack features a capacity of 1800mAh, 7.4V of output power and 13.32 watt-hours. Small and lightweight, lithium-ion batteries can be charged or discharged at any time without developing memory effect.

Compatible Cameras
    Pentax:
  • 645D
  • K-01
  • K-5
  • K-5 II
  • K-5 IIS
  • K-7
UPC: 847628543836

Watson D-LI90 Specs

Battery
Battery Type
1x Pentax D-LI90
Battery Capacity
1800 mAh / 13.32 Wh
Output Voltage
7.4 VDC
Battery Chemistry
Lithium-Ion
Accessory Mounting Thread
No
Dimensions
2.23 x 1.53 x 0.83" / 5.7 x 3.9 x 2.1 cm
Weight
2.9 oz / 82.2 g
Packaging Info
Package Weight
0.23 lb
Box Dimensions (LxWxH)
5.3 x 2.95 x 1.4"

Watson D-LI90 Reviews

Replacement Pentax Battery

By Mark
Rated 3 out of 5
Date: 2026-02-03

I would prefer if the battery clicked more securely into my existing charger so that I would be confident that it couldn't disengage during charge. It seems to hold a reasonable charge albeit less than OEM.

Good Power

By TERRY
Rated 5 out of 5
Date: 2025-05-29

Here again I haven't gotten these yet, but I have been using Watson batteries in my cameras for years now and have never had one go bad on me, the only time iI don't use them is when Watson don't have a battery that fits and then I go with Wasabi. Watson batteries are good in my opinion and are my go to power.

See any errors on this page?

question

My Pentax K-3 factory batteries are labeled D-LI90, 7.2V, 1860mAh (14Wh) Does this Watson D-Li90 work with K-3? If not do you carry one that will? Thank you
Asked by: Anonymous
Yes, it works well. Just a little loose when is attached to the charger, but not a big deal.
Answered by: Guillermo S.
Date published: 2018-08-28

Will this work with the 645z? The compatibility ...

Will this work with the 645z? The compatibility list says 645d, but just want to make sure the Z is covered as well.
Asked by: Dane
Yes, it will work with the 645Z.
Answered by: Rob
Date published: 2019-08-12

How does this Watson battery compare to the Li90 ...

How does this Watson battery compare to the Li90 by ProMaster and/or Pentax batteries?
Asked by: George
The performance is nearly the same, however longevity may be a bit less over time.
Answered by: Zachariah
Date published: 2021-02-22

question

Does this battery work for the K-1? The Pentax version is 7.2V....
Asked by: David
Works well in the K-5. Can't speak about the K-1
Answered by: Max B. A.
Date published: 2018-08-28

question

Will this battery work in the Pentax D-BC90 charger?
Asked by: Kenneth
Yes.
Answered by: Alberto Alejandro F.
Date published: 2018-08-28

question

Will this charge in the Pentax D-BC90 charger?
Asked by: Anonymous
yes, the Pentax D-BC90 will charge the Watson battery. I have some my self and they work fine.
Answered by: KIRK R S.
Date published: 2018-08-28
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