Sylvania VC4511SL01 Replacement Battery 12V 1800mAh

Sylvania VC4511SL01 / VC4512SL01 Series — 12V Ni-MH Replacement Battery (AR8378BK01)

This is a 12V, 1800mAh (21.6Wh) Ni-MH replacement battery for the Sylvania VC4511SL01, VC4512SL01, VC4513SL01, VC4514SL, and 16 additional models in this camcorder line. It replaces OEM part numbers AR8378BK01, AR8395BK01, V80039BK01, and V80086BK01. When the original cell stops holding a charge, this unit restores power to the camcorder for recording and playback.

• VC45xx series compatibility: These Sylvania camcorder models share the same 12V power rail, physical form factor, and connector pinout — which is why a single cell covers the full lineup. The BMS in each model reads the same voltage thresholds, so no firmware difference affects acceptance.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a VC4511SL01 body. The BMS accepted the cell on first install, cycled cleanly without thermal event, and held voltage above the low-battery cutoff threshold through full discharge testing.
• First-use charge cycle on the VC4511SL01: Charge this cell fully inside the camcorder body or OEM charger before your first recording session. The Sylvania BMS maps its battery-remaining indicator against a full charge baseline — skipping this step causes erratic percentage readings from the first use.

Why the VC4511SL01 cuts power mid-recording on a new cell

Ni-MH cells have a flatter discharge curve than Li-ion. The Sylvania camcorder's BMS uses fixed voltage thresholds to call low battery and shut down — thresholds originally calibrated against the aged OEM cell's curve. A fresh replacement cell holds voltage higher for longer, then drops more steeply near end-of-charge. This means the BMS may trigger an abrupt shutdown with what looks like remaining charge. One full conditioning cycle through the camcorder body recalibrates the indicator and reduces unexpected cutoffs.

Battery percentage jumping erratically on the display

If the battery indicator on the VC4511SL01 jumps between levels unpredictably — say from 60% to 20% in one short clip — the BMS has not yet mapped the new cell's discharge curve. This is a voltage-threshold mismatch, not a faulty cell. Run one full charge-to-empty cycle using the OEM charger or the camcorder body itself. After that cycle, the indicator will track accurately against the new cell's actual remaining voltage, which for a full charge sits at approximately 12.0–12.5V.