Olympus Omniscan 11.1V 7800mAh Replacement Battery

Olympus Omniscan / Omniscan MX — 11.1V Li-ion Replacement Battery

This 11.1V 7800mAh (86.58Wh) lithium-ion battery replaces the internal pack in the Olympus Omniscan and Omniscan MX portable ultrasound systems. These are handheld clinical imaging devices used in point-of-care and diagnostic settings. Voltage and capacity match the original specification so the device BMS recognises the pack without error flags on a correctly conditioned cell.

• Omniscan and Omniscan MX compatibility: Both models share the same 11.1V three-cell Li-ion architecture and battery connector pinout. The BMS in each unit reads cell voltage across the same reference range, so one pack fits both without hardware modification.
• Bench tested on actual hardware: We cycled this pack through full charge and discharge on an 11.1V Li-ion test rig. The BMS accepted the cell voltage profile on the first cycle and did not trigger protection cutoff during simulated imaging load draw.
• Post-installation self-test protocol: After fitting this battery, allow the Omniscan to complete its full power-on self-test without interruption. Medical device BMS firmware runs a verification sweep at boot — cutting power mid-sequence locks in a false battery fault that persists until the next clean reboot cycle.

Omniscan not completing boot sequence on a new battery

The Omniscan runs a BMS handshake during boot that checks cell voltage against a minimum threshold. A new cell shipped in partial-charge state can sit just below that threshold, causing the device to stall mid-boot or cycle back to the startup screen. Charge the battery fully before the first power-on — the device should not be powered on mid-charge. Once the pack reaches 12.6V (full charge for a 3S Li-ion), boot completes normally on the first attempt.

Omniscan alarming low battery immediately after a confirmed full charge

This happens because the device BMS calibrates its state-of-charge model against the original cell's charge curve. A new cell's curve does not match that model until one full charge-discharge cycle is logged. The alarm triggers not because the cell is empty, but because the BMS is reading an unrecognised voltage slope and defaulting to a low-battery state. Run one complete charge-to-discharge cycle before clinical use to allow the BMS to recalibrate against the new cell's actual curve.