Yongnuo YN-600 RGB Compatible Battery 7.4V 4400mAh Li-ion

Yongnuo LED YN-600 RGB / YN-216 / YN-300 AIR PRO Series — 7.4V Li-ion Replacement Battery

This 7.4V 4400mAh (32.56Wh) lithium-ion cell replaces the battery pack used in the Yongnuo LED YN-600 RGB, YN-216, YN-300 AIR PRO, and over 27 compatible lighting models. It slots into the same battery bay and connects to the same power rail these panels use to drive their LED arrays. Voltage and capacity figures come from product data — not estimated from web sources.

• YN-600 RGB, YN-216, and YN-300 AIR PRO platform fit: These panels share a 7.4V nominal power rail and use the same physical battery form factor — 70.60 × 38.70 × 39.90mm — with compatible connector orientation. The onboard BMS in each unit reads the same voltage thresholds, so one cell services the full range without modification.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge passes on a YN-600 RGB panel, monitoring BMS handshake and cutoff behaviour. The protection circuit triggered correctly at low-voltage cutoff and the panel accepted the cell without fault codes on startup.
• Color output stability under variable draw: The YN-600 RGB shifts power draw significantly when you change color mode — full RGB output pulls harder than white-only operation. Keep the cell above 6.5V during active RGB shooting; below that threshold, some panels reduce brightness silently to protect the LED driver before the BMS trips.

Why the YN-600 RGB dims or cuts output without a low-battery warning

The YN-600 RGB's LED driver pulls different current depending on color mix and intensity setting. At high saturation RGB modes, peak draw can spike fast enough that a partially depleted cell sags below the driver's minimum operating voltage before the panel's indicator registers low. The panel throttles brightness — or cuts out entirely — as a driver protection response, not a BMS fault. If this happens mid-shoot, check the cell resting voltage with a multimeter; anything below 7.0V under no load means the cell needs a charge before continuing.

Panel shows full charge indicator but output fades quickly in use

Yongnuo panels map battery percentage to voltage thresholds tuned for the original cell's discharge curve. A new cell — or one that has sat discharged for an extended period — can read "full" at rest but sag faster under load than the indicator predicts. This is a display calibration issue, not a faulty cell. Run one complete discharge cycle through active panel use, then charge fully; the voltage-to-percentage mapping typically stabilises after the first conditioning cycle.