Epson DR202 PowerLite 512ST Replacement Battery 10.8V 6600mAh

Epson PowerLite 512ST / 513ST Series — 10.8V Li-ion Replacement Battery (DR202)

This is a 10.8V, 6600mAh (71.28Wh) lithium-ion battery for the Epson PowerLite 512ST, 513ST, Pro C, and Pro CX projectors. It replaces OEM part numbers DR202, EMC36, ME202BB, NL2020, and SMP02. Fit this when the original cell no longer holds charge or the projector won't run untethered.

• 512ST / 513ST / Pro C / Pro CX compatibility: These models share the same 10.8V three-cell series configuration, identical connector pinout, and the same BMS handshake protocol — one cell fits all four without modification.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a PowerLite 512ST. The BMS communicated correctly with the projector's charge controller, with no fault flags or charge interruptions observed across multiple cycles.
• First-install conditioning for PowerLite projectors: After fitting, run one full discharge until the projector powers down from low battery, then charge uninterrupted to 100%. This resets the projector's battery learn cycle and clears the inaccurate health warning that appears on the status screen after every cell swap.

Why the PowerLite 512ST shows "Battery Not Recognized" after fitting a new cell

The 512ST reads battery identity data stored in the cell's EEPROM before it authorises charging. When a new cell is fitted, the EEPROM data doesn't match the projector's cached record from the old battery. This triggers a "not recognized" or "replace battery" flag even though the cell is functional. Running one full discharge-to-cutoff cycle followed by a complete uninterrupted charge allows the projector to re-register the new cell's identity data and clear the flag.

Projector shuts down abruptly while the status indicator still shows charge remaining

This happens when the fuel gauge IC inside the projector has not yet calibrated against the new cell's actual voltage curve. The IC still references the old cell's data, so the percentage reading drifts from actual cell state. The projector hits the hardware low-voltage cutoff — typically around 9.0V under load — before the gauge reaches 0%. Two or three full discharge and charge cycles recalibrate the fuel gauge IC against the new cell and bring the status indicator back into accurate alignment.