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Watson BLS-5 Lithium-Ion Battery Pack (7.2V, 1100mAh)

BH #WABLS5 • MFR #B-3509
45 reviews
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Watson BLS-5 Lithium-Ion Battery Pack (7.2V, 1100mAh)
Key Features
  • Replacement for Olympus BLS-5 Battery
The Watson BLS-5 Lithium-Ion Battery Pack works with the same cameras as the Olympus BLS-5. This replacement battery pack features a capacity of 1100mAh, 7.2V of output power and 7.9 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 BLS-5 Overview

The Watson BLS-5 Lithium-Ion Battery Pack works with the same cameras as the Olympus BLS-5. This replacement battery pack features a capacity of 1100mAh, 7.2V of output power and 7.9 watt-hours. Small and lightweight, lithium-ion batteries can be charged or discharged at any time without developing memory effect.

Compatible Cameras
    Olympus:
  • E-PL2
  • E-PL5
  • E-PM2
UPC: 847628543577

Watson BLS-5 Specs

Battery
Battery Type
1x Olympus BLS-5
Battery Capacity
1100 mAh / 7.9 Wh
Output Voltage
7.2 VDC
Battery Chemistry
Lithium-Ion
Accessory Mounting Thread
No
Dimensions
2.15 x 1.4 x 0.5" / 5.5 x 3.6 x 1.3 cm
Weight
1.8 oz / 51 g
Packaging Info
Package Weight
0.18 lb
Box Dimensions (LxWxH)
3.5 x 3 x 1.1"

Watson BLS-5 Reviews

Battery Swelled but Was Replaced by Watson at No Charge

By Victor
Rated 4 out of 5
Date: 2026-02-03

My original review stated that "Watson batteries are far less expensive than Olympus batteries, but they swell and get stuck in the camera. This can create problems far more costly than the saving on the battery itself." I gave the review 1 star. Since that review was posted, I was contacted by The Gradus Group, who sell the Watson battery, and they sent a replacement at no charge. I appreciate their excellent customer service and which to acknowledge that here. The new battery is working well so far.

Camera battery

By Glenn
Rated 5 out of 5
Date: 2025-04-22

Looks good. Charges. Fits camera. Hope it outlasts the other aftermarket batteries that swell after a number of charges.

See any errors on this page?

Will this work in a Olympus OM-D E-M10 Mark III?

Will this work in a Olympus OM-D E-M10 Mark III?
Asked by: LEON
Yes, this will work with the EM10 mk3.
Answered by: Rob
Date published: 2021-02-01

Is this compatible with Olympus PEN-EPL-10?

Is this compatible with Olympus PEN-EPL-10?
Asked by: Farhan
I use it all the time
Answered by: Ruth
Date published: 2020-05-22

question

Does this battery charge in the OEM E-M10 II charger?
Asked by: Linda W.
i do not have an EM-10 II but it does charge on the original EM-10 supplied charger
Answered by: john m.
Date published: 2018-08-28

Will this work in an Olympus E PM2?

Will this work in an Olympus E PM2?
Asked by: Cecily
Yes Watson BLS-5 Lithium-Ion Battery Pack (7.2V, 1100mAh) is compatible with the Olympus EPM2.
Answered by: Daniel C
Date published: 2022-03-03

question

Does this battery charge in the Olympus OEM charger that came with the EM10?
Asked by: Anonymous
This battery should work in the newer OM 10 Mark II as well it does in the older OM 10.
Answered by: Edwin M.
Date published: 2018-08-28

question

It works on Om-10 (first version, not mk2)?
Asked by: Gustavo M.
Hi Gustavo.I suppose you mean E-M10 not Om-10. I do not have an E-M10 myself, but from all that I have read this battery will work.
Answered by: Jan-Hendrik Servaas H.
Date published: 2018-08-28

question

Is this battery compatible with PEN EPL-7?
Asked by: Ignacio A.
Yes, it should work on any of the Olympus Epl models.
Answered by: Michael S.
Date published: 2019-04-27

question

Can this battery be used with both the the EM10 MarkII and the original EM-10?
Asked by: iris m.
I am using it in the original EM-10 with no issues.
Answered by: Bill S.
Date published: 2018-08-28
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