CAME-TV BOLTZEN B-30 Replacement Battery 7.4V 2000mAh

CAME-TV BOLTZEN B-30 Series — 7.4V Li-ion Replacement Battery

This 7.4V 2000mAh (14.8Wh) lithium-ion battery fits the CAME-TV BOLTZEN B-30, BOLTZEN B-30S, and ULTRA SLIM 576B 3200–5800K LED light panels. These are compact portable video lights used on set and in studio production. The cell dimensions are 70.80 × 38.50 × 21.00mm — check your current battery matches before ordering.

• BOLTZEN B-30 and 576B panel compatibility: These three CAME-TV panels share the same battery bay geometry, voltage rail, and connector spec. The 7.4V nominal supply feeds the LED driver board directly, so cell voltage at rest and under load must sit within a narrow window. A cell outside that window causes the panel to dim unexpectedly or cut off before the indicator reads empty.
• Bench tested on actual hardware: We cycled this cell through the BOLTZEN B-30's draw profile — full brightness RGB mode at rated current. The BMS held cutoff at the correct low-voltage threshold and did not trip early under sustained continuous draw.
• First-cycle conditioning for LED driver accuracy: On the first use, run this battery down fully at mid-brightness before recharging completely. The BOLTZEN's onboard fuel gauge calibrates its remaining-charge indicator against a full discharge-to-charge cycle — skipping this step causes the indicator to read inaccurately from the start.

Why the BOLTZEN B-30 dims suddenly at high RGB output

The B-30's LED driver pulls significantly more current in full RGB mode than in single-colour or low-output modes. A cell with degraded internal resistance cannot maintain the voltage rail under that current spike — the driver detects the sag and steps down brightness to protect the LEDs. This is not a fault in the light itself. Fitting a fresh cell with low internal resistance restores full output and eliminates the stepdown behaviour. If the dimming persists with a new cell, check the battery contact pins in the bay for corrosion.

Battery indicator reads full but panel shuts off mid-shoot

This happens when the fuel gauge has not been calibrated to the new cell's discharge curve. The indicator maps voltage thresholds to percentage, and a new cell discharges differently to the worn cell the gauge was last calibrated against. The result is a sudden cutoff that looks like a fault but is actually the BMS hitting the low-voltage floor while the display still reads a high percentage. Run one complete discharge and full recharge cycle, and the indicator will track accurately from the next session. After calibration, the low-battery warning should trigger at approximately 6.4V.