Best Battery for OM SYSTEM PEN
The OM SYSTEM PEN ships with one new BLS-7 — 1,285 mAh, about 410 CIPA shots. OM’s box list is the body, cap, hot-shoe cover, strap, manual, and that cell. No charger. No USB brick. The spare that matches the new pack is the official OM SYSTEM BLS-7.
Our Top Picks at a Glance
Reviewed September 2026 · OM SYSTEM PEN · BLS-7 1285 mAh · ~410 CIPA · USB-C in-camera · BCS-7 sold separately · no brick in the box
The cell the PEN is specified for. 1285 mAh, ~410 CIPA. E-P7 BLS-50 is a different SKU.
Check Price at Amazon Read full review ↓The missing plate charger. ~90 min with F-7AC + CB-USB13. Lets the spare charge off-camera.
Check Price at Amazon Read full review ↓5V/1A USB-A brick. Official in-camera / BCS-7 path if you skip a spare for now.
Check Price at Amazon Read full review ↓This page contains affiliate links. A purchase through those links may earn Cameraegg a commission at no extra cost to you.
| Item | Role | Official figure | PEN job | Buy |
|---|---|---|---|---|
| OM SYSTEM BLS-7 | Spare cell | 1285 mAh · ~410 CIPA | The pack this body takes | Check price |
| OM SYSTEM BCS-7 | Plate charger | ~90 min with F-7AC | Charge a spare off-camera | Check price |
| OM SYSTEM F-5AC | USB-A 5V/1A brick | 100–240V in · 5V/1A out | In-camera charge; BCS-7 in ~130 min | Check price |
| OM SYSTEM BLS-50 | E-P7 | BCS-5 era cell | Not the PEN’s specified pack | Check price |
How We Picked
Three official facts. This is a BLS-7 rangefinder, not an OM-1 BLX-1 body and not an E-P7 BLS-50.
- Name the cell the camera actually ships with. OM’s 9 Sept 2026 release: BLS-7 is a new 1,285 mAh lithium-ion pack; about 410 shots per charge (CIPA); one included; $99.99 separately; ships late October 2026. OM’s BLS-7 page repeats 1285 mAh, BCS-7 compatibility, and “over 400 images” on the PEN. B&H: battery is BLS-7, about 410 shots, 393 g with battery.
- The box is not a charger kit. OM PEN box contents: camera, body cap, hot-shoe cover, shoulder strap, instruction manual, BLS-7. B&H Q&A (9 Sept 2026): the BLS-7 charges in-camera over USB-C or in the BCS-7; “neither a USB power adapter nor the battery charger is included.” IPX1 sealing does not apply while charging or on HDMI, per the launch footnotes.
- Time the off-camera charger, not a generic PD slogan. OM BCS-7: designed for BLS-7; about 90 minutes with F-7AC + CB-USB13 (USB-C to C); about 130 minutes with F-5AC + USB-A to C. BCS-7 box is the charger only. F-5AC is a 100–240V USB-A adapter at 5V/1A.
Detailed Reviews
OM SYSTEM BLS-7 View on Amazon View on B&H
| SKU | BLS-7 Li-ion — OM SYSTEM |
|---|---|
| Capacity | 1285 mAh |
| PEN rating | About 410 shots (CIPA); OM store: over 400 images |
| Price / ship | $99.99 separately · late October 2026 |
| Charger | BCS-7, or USB-C in the body |
Why it fits the PEN. OM created a new pack for this camera. One BLS-7 is already in the box. A second cell is the travel kit: 410 CIPA shots is a long street day, not a two-body wedding day, and USB-C charging needs the camera parked. Pair it with a V30 card from Best Memory Card for OM SYSTEM PEN.
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OM SYSTEM BCS-7 View on Amazon View on B&H
| SKU | BCS-7 — OM SYSTEM |
|---|---|
| Fits | BLS-7 only (OM copy: “especially designed for BLS-7”) |
| Charge time | ~90 min (F-7AC + CB-USB13) · ~130 min (F-5AC + A-to-C) |
| Price / ship | $119.99 · late October / early November 2026 |
| In the box | Charger only — no AC brick, no cable |
Why it is Value. In-camera USB-C works. It also ties up the PEN and, per OM’s splash footnote, is not the sealed state. BCS-7 is the plate that lets a spare BLS-7 charge on the nightstand. Budget another brick; the charger box is empty of adapters.
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OM SYSTEM F-5AC View on Amazon View on B&H
| SKU | F-5AC USB-AC adapter — OM SYSTEM |
|---|---|
| Output | 5V / 1A · USB Type-A |
| PEN path | In-camera USB-C with an A-to-C cable; BCS-7 in ~130 min |
| Street | $39.99 list · often closer to $32 |
Why it is Budget. The PEN box forgot a brick. F-5AC is the official 5V/1A USB-A adapter OM already sells for USB-charge bodies, and the BCS-7 page names it for the 130-minute charge. It does not add a second 410-shot cell. Buy a BLS-7 when the day outruns one pack.
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If You Need Something Else
BLS-50 is the E-P7 / late PEN. BLX-1 is the OM-1. Neither is the pack OM specified for this body.
OM SYSTEM BLS-50 View on Amazon View on B&H
| This body | B&H / OM: BLS-7. Launch copy calls BLS-7 a new product. |
|---|---|
| BLS-50 era | E-P7 and BCS-5. Different SKU, different charger. |
| PEN job | Do not assume a drawer BLS-50 is a spare PEN battery. |
Wait for the official BLS-7 if the spare drawer is full of BLS-50 and BCS-5 plates. Third-party BLS-7 cells are not a 2026 launch item yet.
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Frequently Asked Questions
Why BLS-7 is Overall instead of BLS-50
OM’s launch release lists BLS-7 as a new 1,285 mAh pack included with the PEN. B&H’s spec block names BLS-7. E-P7 used BLS-50 and BCS-5. a cell from that generation is not the specified PEN battery.
Whether the PEN charges over USB-C
Yes. B&H’s staff answer on 9 Sept 2026: charge the BLS-7 in the camera with a USB-C power adapter, or in the BCS-7. The kit includes neither the adapter nor the charger. OM’s box list matches that.
What 410 CIPA shots means for a day
CIPA 410 is the stills number OM published. Fstoppers’ readout of the same brief also lists about 80 minutes of video under CIPA, or about 130 minutes when zoom and extra operations stay off. A spare BLS-7 is the stills-day hedge; USB-C is the overnight hedge.
Why BCS-7 costs more than the battery
BCS-7 is $119.99 and ships without an AC adapter. The 90-minute figure needs F-7AC and CB-USB13. The charger’s job is to free the camera. The cell’s job is a second 410-shot tank. They are different purchases.
Whether IPX1 applies on the charger
OM’s splash footnote: sealing applies when the PEN is paired with a dust- and splash-proof lens, and it does not apply during charging or HDMI connection. Park the camera to charge.
Final Verdict
For the OM SYSTEM PEN, buy a spare BLS-7. Take the BCS-7 when a second cell should charge while the body stays packed. Take the F-5AC when the only gap is the missing wall adapter. Leave BLS-50 on the E-P7 and BLX-1 on the OM-1. This camera is a BLS-7 body.
Worth knowing before you order. Third-party battery kits are one of the categories that reliably discount during Prime Big Deal Days on October 6–7; first-party packs usually do not.