SeaLife DC1200 Replacement Battery 3.7V 660mAh Li-ion SL7014

SeaLife DC1200 / DC600 Series — 3.7V Li-ion Replacement Battery (SL7014)

This 3.7V, 660mAh Li-ion cell replaces the OEM battery in SeaLife DC1200, DC1400, DC600, and Reefmaster DC600 underwater cameras. It matches the original SL7014 spec and fits the same physical slot without modification. Voltage and capacity are rated at 3.7V / 660mAh (2.44Wh) as supplied.

• DC1200 / DC600 platform fit: These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — that is why a single cell covers the full range. The 40.00 × 31.10 × 5.90mm footprint seats flush in all listed bodies.
• Bench tested on actual hardware: We cycled this cell through the SeaLife DC1200 body, monitored BMS acceptance on first charge, and confirmed stable voltage delivery across the image sensor and flash capacitor recharge draws. No cutoff events occurred within the rated window.
• First-cycle initialisation on dive cameras: Insert this cell and charge it fully inside the camera body using the OEM cable before taking it underwater. SeaLife's BMS maps the battery-remaining indicator against its own charge curve — skipping this step causes the indicator to read inaccurately from the first dive.

Flash capacitor recharge sag on the DC1200 near end of cell charge

The DC1200 flash circuit draws a sharp recharge current burst after each shot. When cell voltage drops toward the lower end of the discharge curve — typically below 3.5V under load — that burst takes longer to complete. The camera body may show the flash-ready indicator more slowly, or the flash may fire at reduced output. This is a load-response behaviour, not a cell fault. If shot-to-shot flash recovery slows noticeably, charge the cell before the next session rather than running it to cutoff.

Battery percentage jumping erratically on the DC1200 display

SeaLife's indicator firmware maps percentage readings against a fixed voltage-threshold table calibrated to the original cell's discharge curve. A new replacement cell may have a slightly different curve shape, so the firmware reads voltage and assigns percentage at different points than expected. This produces jumps — for example, dropping from 80% to 45% in a few shots, then stabilising. Run two full charge-discharge cycles through the camera body. After two cycles the BMS recalibrates its reference points and the display settles to accurate readings.