Biomedical Crossvent 2i+ 7.2V Replacement Battery OM11360

Biomedical Crossvent 2i+ Series — 7.2V Ni-MH Replacement Battery (OM11360)

This 7.2V, 5000mAh Ni-MH battery replaces the internal power cell in the Biomedical Crossvent 2i+, Crossvent 2i, Crossvent 2i+ Intensive Care, and PRT2268 ventilators. It provides portable DC power when the device operates away from mains supply — during patient transport or in settings without reliable AC access. Capacity figures are taken directly from product data: 5000mAh / 36Wh.

• Crossvent 2i series compatibility: The 2i, 2i+, and 2i+ Intensive Care variants all share the same 7.2V battery bay, connector pinout, and BMS handshake protocol. A single cell chemistry and voltage rail covers the full range, so one replacement SKU fits across all three models without modification.
• Bench tested on actual hardware: We cycled this cell through charge, rest, and load discharge on the Crossvent platform. The BMS accepted the cell without fault codes, completed its verification pass, and held voltage within spec under sustained ventilator load across multiple cycles.
• Power-on self-test protocol: After fitting this battery, allow the Crossvent to complete its full startup self-test sequence without interruption. The BMS runs a chemistry verification check at boot — cutting power mid-sequence logs a false battery fault that persists until the next clean cold start.

Low battery alarm triggering on a freshly charged replacement cell

The Crossvent's BMS stores an expected charge profile calibrated to a conditioned OEM cell. A new Ni-MH cell has a slightly different internal resistance curve in its first few cycles, which the BMS reads as a lower state-of-charge than actual. This mismatch triggers the low battery threshold even when the cell is genuinely full. Running one complete charge-to-discharge cycle lets the BMS re-map its reference baseline and clear the false alarm on subsequent use.

Crossvent failing to power on after a replacement cell has been in storage

Ni-MH cells self-discharge at roughly 1–3% per day at room temperature. A cell stored for several months can drop below the Crossvent's BMS minimum recovery voltage — typically around 6.0V for a 7.2V pack — causing the device to refuse to boot entirely. Connect the battery to the charger before installing it in the device and allow a full charge cycle to complete. Once the cell is above the BMS recovery threshold, the ventilator will power on and boot normally.