513400-01 Arjo Huntleigh Air Pump Replacement Battery 14.8V 5200mAh

Arjo Huntleigh Air Pump — 14.8V Li-ion Replacement Battery (513400-01)

This 14.8V, 5200mAh Li-ion battery replaces part number 513400-01 in the Arjo Huntleigh air pump range. These pumps are used in clinical and home healthcare settings for pressure relief and patient mobility support. Portable operation depends entirely on the battery holding charge through shift-length use cycles.

• Arjo Huntleigh air pump platform: These pumps share a common battery bay and BMS handshake protocol tied to the 513400-01 part number. The BMS reads cell chemistry and voltage signature at startup — using a cell that matches the OEM voltage profile keeps the boot sequence from flagging a fault.
• Bench tested on actual hardware: We ran this cell through charge, full-load draw, and BMS communication verification. The protection circuit responded correctly to charge cutoff and low-voltage thresholds without triggering false fault codes on the pump's diagnostic display.
• Post-installation self-test protocol: After fitting this battery, allow the air pump to complete its full power-on self-test without interruption. Medical-grade BMS firmware runs a verification sequence at startup — cutting power mid-sequence locks in a false battery fault that won't clear until the next clean reboot.

Why the air pump won't complete its boot sequence on a new battery

The pump's BMS firmware applies a stricter voltage acceptance window than consumer electronics. A new cell that sat in a warehouse for several months may arrive at 13.2–13.6V — below the threshold the device expects to see before it clears the boot gate. This doesn't mean the battery is faulty. Connecting it to the charger first and bringing it to full charge before fitting it into the pump resolves this in nearly every case.

Charge indicator not reaching 100% on the first charge cycle

On the first charge, the pump's charge IC applies a conservative current limit to an unrecognised cell. This causes the charge cycle to terminate early — the indicator stops at 85–95% and the pump reports partial charge. It is not a fault with the battery or charger. Run one complete charge-to-discharge-to-charge cycle and the charge IC recalibrates its end-of-charge voltage target, after which the indicator reaches full correctly. Do not use the battery in clinical rotation until that first full cycle is complete.