Olympus EndoCapsule RE-1 MAJ-1473 Replacement Battery 7.4V 3600mAh

Olympus EndoCapsule RE-1 / VE-1 — 7.4V Li-ion Replacement Battery (MAJ-1473)

This 7.4V, 3600mAh Li-ion battery replaces OEM part numbers MAJ-1473, MAJ-1467, and MAJ-1469 in the Olympus EndoCapsule RE-1 and VE-1 wireless capsule endoscopy systems. These units are clinical-grade GI imaging devices used in diagnostic procedures. Capacity listed here is from product data — 3600mAh (26.64Wh).

• EndoCapsule RE-1 and VE-1 compatibility: Both platforms share the same 7.4V battery architecture, connector pinout, and BMS handshake protocol — that is why MAJ-1473, MAJ-1467, and MAJ-1469 cross-reference across both units. The BMS communicates cell state data back to the device firmware on startup, so the physical cell and protection circuit must match OEM specifications exactly.
• Bench tested on actual hardware: We ran the battery through charge, discharge, and BMS verification cycles. The protection circuit responded correctly at low-voltage cutoff, and cell voltage held within expected tolerance across the full discharge curve. No false fault codes were triggered during the startup self-test sequence.
• Post-installation self-test protocol: After fitting this battery, allow the EndoCapsule system to complete its full power-on self-test without interruption. The device BMS runs a cell verification step at boot — cutting power mid-sequence stores a fault flag that will persist until the next complete reboot cycle, flagging a battery error even on a fully charged cell.

Why the EndoCapsule RE-1 reports a battery fault after a confirmed full charge

The EndoCapsule BMS stores a learned capacity profile from the previous cell. When a new battery is installed, the firmware compares the incoming cell's state-of-charge data against that stored profile. On the first cycle, the BMS often reads the new cell as below its internal pass threshold — even at full charge — because the learn cycle has not completed. This is not a cell fault. Run one full charge-to-discharge-to-charge cycle before using the device clinically, and the BMS will update its profile to match the new cell.

EndoCapsule not completing boot sequence after the battery sat in storage

Li-ion cells self-discharge during storage at approximately 1–3% per month. If the cell voltage drops below the BMS recovery threshold — typically around 2.5V per cell, or 5.0V for a 2S pack like this 7.4V unit — the protection circuit latches off and the device will not power on at all. The fix is a slow pre-charge recovery: place the battery on the charger and leave it connected for a full cycle without interruption. If the charger detects a voltage below its minimum input threshold, try a charger with a trickle or recovery mode that initiates below 3.0V per cell.