Panasonic DMW-BLK22

Short answer: the DMW-BLK22 is Panasonic’s most widely used camera battery, rated 7.2V / 2200mAh and about 16Wh. It covers the full-frame L-mount S5, S5 II and S5 II X as well as the M43 GH6, GH5 II and G9 II. The original GH5, the GH5S and the first G9 use the DMW-BLF19, which looks similar but has a different latch and contacts and cannot be swapped in. One BLK22 supports roughly half a day of moderate stills work, less when shooting video, so one in the body plus two spares is a dependable configuration for most users.

The sections below cover fitment, real runtime, spare planning and charging care. The quickest way to check which pack your camera needs is the model marking inside the battery compartment — more reliable than memorising the mount system.

1. Which bodies the BLK22 fits

What makes the BLK22 unusual is that it serves two mount systems at once: the full-frame L-mount S5 series and the M43 video flagships. Panasonic standardised the battery across the bodies it released from 2020 onward, which means a user upgrading within that range does not have to rebuild a whole set of spares.

Body	Mount	Battery	Official CIPA rating (LCD)
Lumix S5	L	DMW-BLK22	About 440 shots
Lumix S5 II / S5 II X	L	DMW-BLK22	About 370 shots
Lumix GH6	M43	DMW-BLK22	About 360-380 shots
Lumix GH5 II	M43	DMW-BLK22	About 400 shots
Lumix G9 II	M43	DMW-BLK22	About 390 shots
Lumix GH5 / GH5S / G9 (original)	M43	DMW-BLF19	About 400 shots

The figures come from official CIPA cycle testing; real use varies with screen brightness, in-body stabilization, burst shooting and wireless, so treat them as a basis for comparison rather than a guarantee.

Two mistakes are especially common. The first is treating the GH5 and GH5 II as sharing a battery, when only the GH5 II moved to the BLK22. The second is assuming that L mount always means BLK22, when the S1, S1R and S1H use the larger DMW-BLJ31, a completely different shape. Glancing at the marking before you leave the house is easier than remembering specs.

2. How far 16Wh goes in practice

At 2200mAh this pack sits in the upper-middle range for today’s mirrorless cameras, but Panasonic bodies are feature-dense and draw accordingly. By typical intensity, use falls into three bands:

• Stills-led work: one pack usually manages 300-400 shots; heavy EVF use, frequent playback or Wi-Fi transfer drops that to around 250.
• 4K video: the S5 II series and GH6 are no longer limited to 30-minute clips in most 4K modes, but a single pack typically records for 70-110 minutes, and high bitrates, stabilization and heat shorten that.
• 6K / ProRes / high frame rates: draw is close to double, and the body heats noticeably, so in practice temperature usually becomes the limit before the battery does.

That explains a common perception: video shooters often feel the battery is “not lasting”, when in fact continuous recording keeps the sensor and processor at full load, drawing far more than intermittent stills. Estimating spares by shooting type is more dependable than estimating by frame count.

3. A sensible spare plan

One BLK22 is not heavy, so two extra packs barely register on your shoulder while markedly reducing on-set anxiety. Plan in this order:

1. Work out the session length: for a half day of stills, two packs including the one in the body are usually enough; for a full day out, a wedding or conference coverage, plan on three.
2. Add separately for video: for long interviews and event coverage, budget one pack per 1.5 hours and keep one unopened as an emergency.
3. Keep to one batch: mixing old and new packs makes the charge reading non-linear and tends to shut down abruptly around 20%, so rotate packs of the same batch.
4. Consider external power: several bodies including the S5 II, GH6 and G9 II support USB-C PD input, so for fixed-position work a small PD supply running continuously is simpler than stacking batteries.

For long fixed-position shoots, an official vertical grip or a dummy battery (DC coupler) arrangement is also worth considering; for handheld work, light spares are the better answer. YO’s BLK22 is a middle-of-the-road value option with honest capacity figures and a properly specified protection circuit, suited as a supplement rather than a wholesale replacement for first-party packs.

4. Charging, cold and long-term storage

The BLK22 charges in the body or in a dedicated dock. When using in-body USB-C, make sure the supply supports PD — a plain 5V charger is very slow and may only hold the level steady during recording. The dock’s advantage is handling several packs at once, so everything is topped up before you leave.

Cold is a frequent issue for Panasonic users. Below 0°C a lithium pack’s internal resistance rises and the voltage sags, tripping a low-battery warning, and some of the charge often returns once it warms up. The winter routine is to keep spares in an inside pocket and rotate them; coming in from the cold, wait until body and pack reach room temperature before charging to avoid condensation. For a more systematic cold-testing method, see our minus 10°C battery test; the principle holds across brands.

For long-term storage, leave 40-60% charge and top up every three to six months. Do not charge a pack that has swollen or deformed — not uncommon on the BLK22, usually from being stored full at high temperature. More buying and care material for this model is on the DMW-BLK22 category page; if you also shoot Sony, the NP-FZ100 section has capacity and runtime data you can compare against.

FAQ

Can the GH5 use a DMW-BLK22?

The original GH5 and GH5S cannot — they take the DMW-BLF19, and only the GH5 II switched to the BLK22. The two packs are close in size, but the latch shape and contact positions differ, forcing one in can damage the compartment, and no working adapter exists. Always go by the marking inside the battery bay.

Are the BLK22 and BLJ31 interchangeable?

No. The BLJ31 is used by the S1, S1R and S1H and is larger in both size and capacity; the BLK22 serves the S5 series along with the GH6, GH5 II and G9 II. Even within the L-mount system, battery specs are not unified.

How long can one BLK22 record video?

It depends on resolution, bitrate, stabilization and temperature. Most bodies manage about 70-110 minutes of continuous 4K on a single pack, less with 6K or ProRes, and recording often stops on overheating first. For long sessions, rotate two or more packs and give the body cooling gaps.

Do third-party BLK22 packs show inaccurate charge levels?

Sometimes. Third-party communication chips and cell resistance differ from the original, and the usual symptoms are jumping percentages, a shutdown near 20%, or a “cannot use this battery” prompt. Favour packs that explicitly name the S5 II and GH6, and keep a return option open.

Short answer: these three are not a new-for-old replacement chain but three parallel tiers matched to body class. The DMW-BLK22 (about 2200mAh / 16Wh) serves the S5 series, GH6, GH5 II and G9 II; the DMW-BLF19 (about 1860mAh / 13.4Wh) is for the GH5, GH5S, original G9 and GH4 generation; and the DMW-BLG10 (about 1025mAh / 7.4Wh) is for small bodies such as the GX85 and GX9. Their latches and contact positions all differ, so none will physically fit another’s slot. The only reliable basis for choosing is the model marking in the camera’s battery compartment — not the mount, and not the release date.

Many people discover their spares are useless only after changing bodies, and the habit of buying by mount is usually the cause. The boundaries between the three are set out below.

1. How the three tiers differ

In the M43 era Panasonic split batteries by body size: small bodies took a thin pack to stay portable, flagships took a thicker one to support cooling and video performance. That logic carried into the L-mount era, with new model names.

Model	Nominal capacity	Energy	Typical fitment
DMW-BLK22	About 2200mAh	About 16Wh	S5, S5 II, S5 II X, GH6, GH5 II, G9 II
DMW-BLF19	About 1860mAh	About 13.4Wh	GH3, GH4, GH5, GH5S, G9 (original)
DMW-BLG10	About 1025mAh	About 7.4Wh	GX85 / GX80, GX9, GF9 / GX850 and other small bodies

On paper the BLK22 holds about 20% more energy than the BLF19 and more than twice the BLG10. But a capacity gap is not a runtime gap: the bodies that take the BLG10 are mostly entry-level or portable designs with restrained features, so 7.4Wh is not especially tight there, while the BLK22 faces high-draw bodies like the S5 II and GH6 where 16Wh counts as merely adequate.

2. Why “L mount means BLK22” is wrong

This is the most common misconception. L-mount bodies do not share one battery: the S1, S1R and S1H use the DMW-BLJ31, which is noticeably larger in both size and capacity than the BLK22, while only the S5 series uses the BLK22. In other words, incompatible battery specs exist within a single mount.

The reverse also happens: compatibility can cross mounts, since the BLK22 serves both the L-mount S5 series and the M43 GH6, GH5 II and G9 II. That shows the split is driven by body platform and power design, not by lens mount. Remove “mount” from your criteria when buying and most mistakes disappear.

3. A four-step method for choosing

If you are unsure which pack your camera needs, work through these in order; it usually takes a minute or two.

1. Open the compartment and read the marking: the back of the pack or the inside of the door usually carries a DMW- model number, which is the most authoritative source.
2. Match the full body designation: note that the GH5 and GH5 II, and the G9 and G9 II, are separate generations with different batteries. A “II” suffix often signals a battery change.
3. Compare contact count and latch shape: the BLK22 and BLF19 are similar in thickness, but the latch notch sits in a different place and the contact layout differs, which is visible to the eye.
4. Then confirm charging: newer bodies mostly support USB-C PD in-body charging while older ones rely on a dock, which affects how many packs and chargers you buy.

If you run both L-mount and M43 systems, favour a combination that shares batteries — an S5 II with a G9 II, for instance — so spares and chargers overlap and you carry one battery type instead of two. The real burden is much smaller than the spec sheets suggest.

4. Mixing, adapters and third-party packs

Adapters advertised as “BLF19 to BLK22” turn up occasionally, but most only change the shape and cannot bridge the protocol differences. When the body cannot read battery temperature and cycle data, the mild outcome is a wrong charge reading and the severe one is a refusal to power on or a sudden shutdown mid-recording — a serious risk to footage being written. They are not advisable for paid work.

Third-party selection is more straightforward: keep capacity claims reasonable, require a complete protection circuit and prefer products that name the supported bodies. Brands such as YO list both BLK22 and BLF19 equivalents at modest prices, suitable as a supplement rather than a replacement. Two things are worth watching: buy the same batch, so that mixing old and new packs still gives a linear charge reading; and keep a return channel open, since some batches show compatibility prompts on high-draw bodies such as the GH6.

For a cross-brand reference on capacity and cold behaviour, the test methods in the NP-FZ100 section apply to any brand; if you shoot outdoors in the cold year-round, the operational detail in our minus 10°C battery test is worth reading first. Buying and care advice specific to the BLK22 is collected on the DMW-BLK22 category page.

FAQ

Will a BLF19 fit a GH5 II?

No. The GH5 II moved to the DMW-BLK22, and both compartment dimensions and contact positions differ, so a BLF19 will not seat properly. Only the original GH5 and GH5S take the BLF19, and since the two generations look alike, check the full model designation.

How big is the capacity gap between the BLG10 and BLK22?

By nominal energy, the BLK22’s 16Wh is more than twice the BLG10’s 7.4Wh. But they serve different body classes, so the multiple does not translate into shot counts — small bodies draw less, so each watt-hour goes further.

Are batteries always shared within a mount?

No. The L mount alone spans the BLJ31 and BLK22 among others, and S1-series packs will not fit an S5. Judge by body platform and battery model, not by lens mount.

Can the chargers for the three be mixed?

No. Panasonic docks are shaped around a specific pack and contact layout, so BLK22 and BLF19 chargers are not interchangeable, and forcing a pack in can cause poor contact. If you run several bodies, match chargers to battery models, or favour bodies with USB-C in-body charging to cut down on accessories.