GE TruSat Pulse Oximeter 4.8V Replacement Battery 6050-0006-578

GE TruSat Pulse Oximeter — 4.8V Ni-MH Replacement Battery (6050-0006-578)

This is a 4.8V, 3600mAh Ni-MH replacement battery for the GE TruSat Pulse Oximeter and compatible Datex Ohmeda TruSat monitors. It fits devices using OEM part numbers 6050-0006-578, 6050-0006-578 Rev J, and B11435. The battery powers continuous SpO2 and heart rate monitoring during patient care when the original cell has degraded past clinical use.

• TruSat and Datex Ohmeda TruSat platform fit: These monitors share the same 4.8V four-cell Ni-MH architecture, connector pinout, and BMS handshake protocol. A single cell pack covers both variants without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge on the TruSat platform. The BMS accepted the cell, completed its initialisation cycle, and held stable voltage through a full load profile. No false battery fault flags were triggered after a complete charge cycle.
• Post-swap power-on self-test: After installing this battery, allow the TruSat to complete its full power-on self-test without interruption. Medical device BMS firmware runs a cell verification routine at startup — cutting power during this sequence latches a false battery fault that persists until the next clean reboot.

Low battery alarm firing immediately after a confirmed full charge on new cell

The TruSat BMS stores a learned capacity baseline from the previous cell. A new Ni-MH cell at 3600mAh looks different to the charge IC compared to a worn OEM cell, and the firmware can flag a threshold mismatch on the first cycle. The BMS needs one complete charge-to-discharge cycle to recalibrate its capacity register against the new cell chemistry. Run the device through one full charge and discharge before placing it into clinical rotation. After that cycle the alarm threshold resets and the low battery flag clears.

Device will not power on after battery sat in storage

Ni-MH cells self-discharge at roughly 1–2% per day in storage. If the replacement battery has been on a shelf for several months, its resting voltage can drop below 4.0V — below the TruSat BMS recovery threshold. The BMS interprets this as a dead or damaged cell and blocks the boot sequence entirely. Connect the device to mains power and leave it on charge for a minimum of four hours before attempting to power on. Once the cell climbs back above approximately 4.4V, the BMS exits lockout and the device boots normally.