DJI BCX204

Short answer: the Osmo Action 3 and Action 4 use the same battery, rated about 1770mAh, and are fully interchangeable; the Osmo Action 5 Pro moved to a new model, the BCX204, at about 1950mAh, with different dimensions and communication protocol, so it will not work with the previous generation. In other words, upgrading from an Action 4 to an Action 5 Pro means replacing your spare packs and charging hub as well. Confirming the camera generation before buying matters more than comparing capacity figures.

An action camera battery looks like a minor accessory, but it determines continuous recording time, cold-weather usability and how much of your kit carries over. The relationships across the three generations are set out below.

1. Battery fitment across the three generations

DJI established the cold-resistant battery plus magnetic quick-release scheme with the Action 3, and the Action 4 reused the same battery and housing, so accessories are highly compatible between the two. The Action 5 Pro changed the body structure, sensor and cooling, and the battery changed with it.

Body	Battery model	Nominal capacity	Compatibility
Osmo Action 3	Previous-generation cold-resistant battery	About 1770mAh	Interchangeable with Action 4 both ways
Osmo Action 4	Previous-generation cold-resistant battery	About 1770mAh	Interchangeable with Action 3 both ways
Osmo Action 5 Pro	BCX204	About 1950mAh	Not compatible with Action 3 / 4

One caveat: shell printing can vary between batches and sales channels, so fit should be judged by the shape of the camera compartment and the official compatibility list. When you see the word “universal”, check whether it means between the Action 3 and 4 or whether it quietly includes the 5 Pro — the latter is usually a seller being vague.

2. Why the two generations do not mix

Externally they are both magnetically attached square packs, but the differences sit in the details, and almost every one of them affects usability:

• Dimensions and latch: the 5 Pro compartment was adjusted slightly, so the old pack will not go into the new body and the new pack will not go into the old one. This is physical incompatibility.
• Communication protocol: the fuel gauge and temperature protection communicate differently as the platform was updated, so even forced contact may leave the body unable to read the charge, producing jumps or errors.
• Charging hub: official hubs are generation-specific, with different contacts and bay dimensions. An Action 3/4 hub cannot charge a BCX204, and vice versa.
• Water sealing: waterproofing on the Action series depends on the door and O-ring working together, and a pack of the wrong model breaks that seal. Confirm before you get in the water.

So “does it fit in the slot” is not the test; “does the body recognise it and does the door seal” is. The cost of mixing is usually not that it fails outright, but a sudden shutdown or water ingress at the worst moment — and neither is easy to recover from on an action camera.

3. How many to buy, by use case

The official runtime figures (about 160 minutes maximum for the Action 3/4 and about 4 hours for the 5 Pro) all assume 25°C, low bitrate and some features disabled. In real skiing, cycling or diving, expect 60-70% of that. Configure in this order:

1. Confirm the generation first: Action 3/4 take the previous-generation pack, the 5 Pro takes the BCX204. Get this wrong and everything after it is wrong.
2. Size to your shooting rhythm: two packs is enough for short-clip editors; for continuous capture (cycling, fishing, long vlogs) start at three and rotate through the charging hub.
3. Consider cold use: for winter or altitude, favour the official cold-resistant spec, since third-party low-temperature cutoffs are generally more conservative and shut down earlier.
4. Then think about charging: multi-battery users are better served by a hub than charging one at a time in the body; single-battery users can simply use a PD power bank.

Third-party packs are another option. Brands such as YO make separate Action 3/4 and 5 Pro versions by generation, usually at modest prices, which suits use as a supplement to first-party packs. Two things matter when choosing: whether the specific generation is named, and whether the temperature-sensing contact is retained — that directly affects false warnings in the cold.

4. Two things beyond runtime

The first is cycle life. Action camera packs are small with high discharge rates, and storing them full or fast-charging them often accelerates wear; after a year or two, a pack with the same rating may deliver only 70-80% of its original time. Getting into the habit of storing at around half charge after a shoot clearly extends service life.

The second is flying and transport. Lithium batteries must travel in the cabin and cannot be checked — a general civil aviation rule that has nothing to do with brand. For capacity arithmetic and declaration requirements, see our guide to whether camera batteries can fly; the logic applies to action camera packs too. For cold-weather behaviour, compare against our minus 10°C battery test, where the method and conclusions reinforce each other. More accessories for this model are collected on the Osmo Action battery category page.

FAQ

Can an Action 4 battery be used in an Action 5 Pro?

No. The two generations differ in dimensions, latch and communication protocol, and the Action 5 Pro uses the new BCX204. It does not work in reverse either — a 5 Pro pack will not fit an Action 3/4 compartment.

Are the Action 3 and Action 4 batteries identical?

They share one spec at about 1770mAh and swap in both directions. The two bodies use the same pack and magnetic quick-release structure, and the charging hub is shared as well, which is why Action 4 owners keep their accessories when upgrading.

Does a third-party battery affect waterproofing?

It can. Waterproofing depends on how precisely the door and O-ring mate, and if a third-party shell is out of tolerance the door may not compress fully. Use a first-party pack for diving or heavy water exposure; for ordinary dry-land use the impact is small.

How should a battery be stored when not in use?

Discharge to 40-60%, keep it somewhere cool and dry, and top up every three to six months. Storing full or completely empty accelerates wear, and a pack that has swollen or deformed should be retired immediately — do not charge it or fit it again.

Short answer: when a long Osmo Action recording fails, it is usually the body hitting thermal protection rather than the battery running flat. The three things that actually help are lower power draw, continuous power delivery and temperature control. In practice: drop bitrate and frame rate to what you need, switch off unused wireless and the front screen, run a PD power bank while recording, and keep airflow around the body. In the cold you also need insulation — below 0°C a lithium pack’s internal resistance rises, the voltage sags, and the camera shuts down.

The rest of this covers power sources, a settings checklist, power setups and cold handling, and applies to the Action 3, Action 4 and Action 5 Pro; menu names differ slightly between generations.

1. Where the charge actually goes

An action camera’s battery holds roughly a third of a phone’s, yet it has to drive stabilization, high-bitrate encoding and continuous writing, so power density is high. Ordered by impact, the main draws are:

• Frame rate and bitrate: 4K 120fps can draw two to three times what 4K 30fps does, and heat climbs sharply, often triggering a throttle or stop within minutes.
• Electronic stabilization: continuous cropping and computation is a standing load on the processor. Turning it off, or using a lower setting, saves a clear amount.
• Screens, front and rear: two panels running during a long take is a significant share. Dimming them and shortening the timeout pays off directly.
• Wireless: Wi-Fi monitoring and Bluetooth remote are easy to leave on outdoors, and running them for hours drains steadily.
• Ambient temperature: heat reduces cooling efficiency so the body protects itself sooner; cold shrinks usable capacity. Both directions cut recording time.

This matters because simply carrying another battery does not solve “it stops at 20 minutes” — the limit is temperature, not charge.

2. A settings checklist for long takes

If the goal is continuous recording rather than maximum image quality, work through these in order; they usually extend usable time considerably:

1. Drop resolution and frame rate to what you need: 4K 30fps or 2.7K 60fps covers most documentation, with a clear step down in both heat and draw.
2. Turn off stabilization you do not need: on a fixed mount or a car rig, switch it off and enable it only for handheld work.
3. Dim the screen and shorten the timeout: if you are not watching it, let it go dark quickly.
4. Disconnect Wi-Fi and Bluetooth: enable them only for monitoring or offloading.
5. Leave airflow around the body: avoid wrapping it in clothing or helmet padding, and prefer a metal mount over plastic for heat transfer.
6. Record in segments: keep takes to 10-20 minutes with a deliberate cooling gap, which is more reliable than running until protection stops you.

Stacked together, these usually gain more than an extra battery. Segmented recording matters even more for clip safety than for runtime — file corruption from a mid-take power loss is not rare on action cameras.

3. Power on location: three typical setups

Different shooting styles call for very different power arrangements. The comparison below is organised by scenario.

Scenario	Recommended power	Watch out for
Fixed-position long takes (interviews, livestreams, in-car)	PD power bank + long cable, charging while recording	Choose a PD-capable, stable-output model; the cable must carry both data and current, and a poor one will drop voltage
Handheld moving work (vlogging, hiking)	Body battery + 2-3 spares rotated	Keep spares against your body, away from keys and other metal
Cycling, skiing, water sports	Body battery, no external cable	Cables compromise sealing and mounting security; carry more packs instead

Charging while recording has one precondition: the body runs warmer because of the charging, so in hot conditions protection trips sooner. That makes this approach suitable for environments with airflow, air conditioning or water cooling, not sealed hot spaces. Power bank performance also drops in the cold, so in winter an inside pocket beats hanging it off the outside of a pack.

Spare count can be roughly one pack per hour, adjusted for whether you are charging while recording. Third-party packs such as YO’s are made in versions per camera generation, so confirm the match when buying. The Action 3/4 and Action 5 Pro batteries are not interchangeable; the mapping is on the Osmo Action battery category page.

4. Cold-weather drain: why and what to do

In the cold a lithium pack’s electrolyte thickens, internal resistance rises and the usable capacity falls. The typical symptom is a jump from 40% straight to 5% and a shutdown, followed by a partial “recovery” once warm. That is normal physics, not a failed battery. The Action series is officially rated to operate at roughly -20°C, but usable time is still markedly shorter than at room temperature.

There are four responses: keep spare packs in an inside pocket at 10°C or above; let the body and battery equalise in temperature before shooting rather than carrying the camera straight from a warm room outdoors; lower frame rate and brightness to reduce instantaneous current; and do not charge immediately afterwards, waiting until everything is back at room temperature to avoid internal condensation. For a more detailed cold-testing method, see our minus 10°C battery test.

If you travel or fly to shoot locations often, it is worth checking lithium transport rules in advance; the logic in whether camera batteries can fly applies equally to action camera packs.

FAQ

How long can an Osmo Action record continuously?

Officially, under ideal 25°C conditions, the figures are about 160 minutes maximum for the Action 3/4 and up to 4 hours for the Action 5 Pro. Real continuous recording typically lands at 60-70% of that, less with high frame rates, heat or stabilization, and it often stops on thermal protection before the battery is empty.

Does charging while recording damage the battery?

Short-term impact is limited, but sustained charging at high temperature accelerates ageing. Use it in a well-ventilated, reasonably cool place, avoid running maximum bitrate and fast charging at the same time, and leave the body thermal headroom.

What can I do about fast drain in winter?

Warm the pack to above 10°C before fitting it, carry spares against your body, and put the camera back in an inside pocket between takes. Cold-induced jumps usually recover partially on warming, but repeated deep discharge shortens life, so carry one or two extra packs in winter.

Can third-party batteries handle long recordings?

Yes, but choose ones that name the specific camera generation and include a temperature-sensing contact. Long recordings demand stable discharge, and packs with inflated capacity claims tend to sag in the later stages and shut down earlier than a first-party battery.