Codan A707V Medical Device Replacement Battery 12V 1800mAh

Codan A707V / A708V — 12V Ni-MH Replacement Battery (110299-X)

This is a 12V, 1800mAh Ni-MH replacement battery for the Codan Argus infusion pump A707V and A708V. It replaces OEM part number 110299-X and restores power to the internal battery bay without modification. Capacity is 1800mAh (21.6Wh), matching the original specification.

• A707V and A708V platform fit: Both models share the same 12V battery bay, BMS handshake protocol, and connector pinout under OEM part 110299-X. The Ni-MH chemistry is a factory requirement on these infusion pumps — the charge IC is calibrated to NiMH delta-V termination, not lithium charge curves.
• Bench tested on actual hardware: We cycled this cell through the Argus pump's charge circuit and confirmed the BMS accepted the cell, completed charge termination correctly, and did not throw a battery fault code on the display during the power-on sequence.
• First-use protocol on infusion pumps: After fitting this battery, allow the device to complete its full power-on self-test without interruption. The Argus BMS runs a verification pass at startup — cutting power during that sequence logs a persistent battery fault that does not clear until the next clean reboot.

Why the Argus pump displays a battery fault after a confirmed full charge

The Argus infusion pump BMS stores a chemistry baseline from the previous cell. When a new Ni-MH cell goes in, the internal charge logger reads unfamiliar capacity headroom and flags it against the stored threshold. This is not a fault with the replacement cell — it is the BMS running a conservative check against an outdated reference. One complete charge-discharge cycle resets the logger and clears the fault on the next startup. Do not use the pump clinically until that first cycle is complete.

Pump will not power on after the replacement battery sat in storage

Ni-MH cells self-discharge at roughly 1–2% per day in storage. A cell that has sat uninstalled for several weeks may drop below the Argus BMS recovery threshold — typically around 10V on a 12V pack — and the device will not boot. Connect the pump to mains power first and allow the charge circuit to run for at least 30 minutes before attempting to power on. If the cell voltage has dropped below 9V, the charge IC may not initiate — in that case, use a standalone Ni-MH charger to bring the pack above 10.5V before reinstalling.