HillRom Infant Scale N15 12V Replacement Battery 2300mAh

HillRom Infant Scale N15 — 12V Sealed Lead Acid Replacement Battery

This is a 12V 2300mAh (27.6Wh) sealed lead-acid replacement battery for the HillRom Infant Scale N15. The N15 is a medical-grade infant weighing scale used in hospitals, neonatal units, and clinics for accurate newborn weight measurement. This battery powers the scale's display and internal measurement electronics.

• N15 platform fit: The N15 uses a sealed lead-acid cell at 12V to support stable low-draw display and load-cell circuitry. SLA chemistry suits this application because it holds a flat discharge curve under the scale's light, consistent load profile without voltage sag that would skew weight readings.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the bench. The BMS accepted the cell without fault flags, and the scale completed its full power-on self-test sequence without interruption across repeated cycles.
• Post-swap startup protocol: After fitting this battery, allow the N15 to complete its full power-on self-test without cycling power mid-sequence. The device runs a BMS verification check at boot — cutting power during this step triggers a false battery fault that persists until the next clean reboot from a fully charged state.

N15 not completing boot sequence after battery swap

The N15 runs a self-test at startup that checks battery voltage against an internal threshold before it will proceed to the weighing screen. A new SLA cell that has been in storage will often sit below 12.0V — sometimes as low as 11.6V — which is enough to stall the boot sequence even though the battery is not depleted. Charge the replacement cell fully before installation. A fully charged 12V SLA cell should read between 12.6V and 12.8V at rest before it goes into the device.

Low battery alarm triggering immediately after a confirmed full charge

This happens because the N15's BMS compares the new cell's charge curve against a learned baseline calibrated to the previous battery's internal resistance. A fresh SLA cell has different charge acceptance characteristics in its first few cycles, and the alarm threshold can trip prematurely. Run one complete charge-discharge cycle — power the scale on, let it discharge under normal use, then charge it fully again. After the first full cycle, the BMS recalibrates and the alarm clears at the correct voltage level.