Lytro Illum A1 Replacement Battery DC-A950 3.7V 2100mAh

LYTRO ILLum A1 / ILLum F1 — 3.7V Li-ion Replacement Battery (DC-A950)

The DC-A950 is a 3.7V, 2100mAh (7.77Wh) lithium-ion cell that powers the LYTRO ILLum A1 and ILLum F1 light field cameras. It slots into the same battery compartment as the original and connects to the camera's BMS via the same contact arrangement. Replace it when the original cell no longer holds a charge or the camera shuts down unexpectedly during a shoot.

• ILLum A1 and ILLum F1 compatibility: Both models draw from the same 3.7V rail and use an identical battery form factor and contact layout. The DC-A950 part number covers both — no adapter or modification needed.
• Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle and verified that the BMS accepted the replacement without a fault flag. Capacity output matched the 2100mAh spec within normal tolerance.
• First-use charge cycle for ILLum cameras: Insert the new cell and charge it fully through the camera body or OEM charger before your first shoot. The ILLum BMS calibrates its battery-remaining indicator against the first complete charge cycle — skipping this step often causes the display to read inaccurately from the start.

Why the ILLum's battery percentage jumps after fitting a new cell

The ILLum maps its battery-remaining display to a voltage-threshold curve built from the original cell's discharge profile. A new cell discharges along a slightly different curve — flatter in the mid-range, steeper at the low end. The camera's indicator logic reads those voltage steps as erratic capacity changes and shows jumps of 10–20% rather than a smooth decline. One full charge cycle completed inside the camera body resets the baseline, and the display stabilises from the next discharge onward.

ILLum showing "no battery" or refusing to power on with a valid replacement cell

The ILLum performs a BMS handshake on power-up to confirm the cell is within an acceptable voltage window. A new battery that has self-discharged in storage may sit below the camera's minimum acceptance threshold — typically around 3.2V — causing the body to reject it entirely rather than display a low-battery warning. Place the cell in an external charger rated for Li-ion until it reaches at least 3.6V, then reinsert it. The camera should recognise it immediately at that voltage.