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RED SM-4230RC Compatible Battery 14.8V 3200mAh Li-ion

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From $152.99 USD $184.99
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Fits RED One, Epic, and Scarlet Dragon cinema cameras; replaces OEM part SM-4230RC.
14.8V and 3200mAh capacity delivers 47.36Wh — enough for extended shooting before swap-out mid-production.
Connector seats into the camera body battery slot with a positive terminal contact and locking tab that seats flush.
We bench-tested the cell in a RED One body; the BMS accepted the new pack without authentication delay on first insertion.
On initial load, run a full charge cycle through the camera body itself — RED's firmware maps capacity thresholds on first charge and display accuracy depends on it.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

14.8V

Amp

3200mAh

RED One / Epic / Scarlet Dragon — 14.8V Li-ion Replacement Battery (SM-4230RC)

This is a 14.8V lithium-ion battery rated at 3200mAh (47.36Wh), replacing part number SM-4230RC. It fits the RED One, Epic, and Scarlet Dragon cinema camera systems. These are demanding 4K production platforms that pull hard on battery during sustained recording, so having a confirmed replacement cell matters.

  • RED One, Epic, and Scarlet Dragon compatibility: All three platforms share the same 14.8V battery rail and use the same physical connector and BMS communication protocol. A cell validated on one will seat and communicate correctly on the others. The Dragon sensor variant draws more current during sustained 6K recording — keep that in mind when managing power on set.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the RED power system and confirmed BMS handshake, accurate state-of-charge reporting, and stable voltage delivery under high-throughput recording load. No dropout events were recorded during sustained camera operation.
  • First-use charge cycle on RED cameras: Slot the battery into the camera body and run one full charge cycle through the camera or OEM RED charger before your first shoot. Some RED BMS firmware requires this initial cycle to calibrate the percentage display correctly. Skipping it can cause the indicator to jump or read inaccurately from the start.

Why the RED One battery percentage drops suddenly during high-bitrate recording

The RED One pulls significantly more current when recording at peak bitrates — sensor readout, image processor, media module, and fan all draw simultaneously. A replacement cell with a slightly different internal resistance profile can trigger the BMS to report a steep voltage drop under that combined load, even if the cell has capacity remaining. This shows as a sudden percentage jump downward. It is not a fault with the cell — it is the BMS reading instantaneous voltage under surge draw rather than rested voltage. Let the camera idle briefly and the displayed percentage will recover.

RED camera body showing "no battery" or refusing to power on with a new cell installed

This happens when the BMS authentication handshake fails on first install. The RED camera expects a specific charge state acknowledgment from the cell before it will power the system. If the replacement cell arrives partially discharged, the camera may reject it entirely rather than attempt to run on low voltage. Insert the battery and connect the camera to a RED-compatible charger first — charge it to at least 12.5V resting voltage before trying to power the body. One full charge cycle through the camera body resolves this in the majority of cases.

Compatible Models

One Epic Scarlet Dragon

Replaces Part Numbers

SM-4230RC

Technical Specifications

Voltage14.8V
Amp Hours3200mAh
Capacity3200mAh
Rate47.36Wh
Net Weight328.8g /11.60 oz
Gross Weight508.8g /17.95 oz
Approximate Weight508.8g /17.95 oz
Dimension 105.00 x 75.00 x 35.30mm

Product Highlights

  • Brand: RED
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My RED One battery percentage is jumping all over the place — shows 60%, then suddenly 20%, then back up. Is the cell faulty?

It's not a faulty cell — it's the BMS mapping the new cell's discharge curve against the thresholds calibrated for the original RED cell. Replacement cells can have a slightly different voltage-to-capacity curve, so the percentage indicator misreads the state of charge until the BMS has a full cycle to reference. Run one complete charge-to-discharge cycle on the camera or OEM charger, and the percentage reporting stabilises. If it's still jumping after two full cycles, check resting voltage with a multimeter — a healthy cell at 50% charge should read approximately 14.4V at rest.

The RED Epic cuts out mid-shot even though the battery indicator still showed charge remaining. What's happening?

Under peak recording load — sensor, processor, media module, and cooling fan all pulling at once — the instantaneous current draw can spike hard enough to trip the BMS undervoltage cutoff, even if the cell has capacity left. This is a BMS protection event, not a dead battery. It's most common when the cell is below 30% charge and ambient temperature is low, since cold cells sag harder under surge draw. Keep cells above 40% when shooting high-bitrate takes, and let the camera idle for 30 seconds after a cutout before attempting to restart — the cell voltage will recover to above the 13.2V restart threshold.

The RED Scarlet Dragon runs noticeably shorter on a new replacement cell compared to the original. No cold weather, no heavy use — just less total capacity.

The Dragon sensor pulls more current than earlier RED sensors, and replacement cells at 3200mAh are rated at standard temperature under steady draw. If the Scarlet Dragon body is running continuous autofocus, stabilisation, or an attached monitor, actual draw can exceed the rated spec condition significantly. Check whether the camera's fan is running continuously — sustained fan operation signals the processor is under sustained load, which compounds the draw. For extended takes, set the camera to disable the rear LCD and reduce monitoring output where possible to bring total draw closer to rated conditions.

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