NARCO AIR SHIELDS Warm Weigh N-15 Replacement Battery 12V 2300mAh

NARCO AIR SHIELDS Warm Weigh Infant Scale N-15 — 12V Sealed Lead Acid Replacement Battery

This is a 12V 2300mAh (27.6Wh) sealed lead-acid battery for the NARCO AIR SHIELDS Warm Weigh Infant Scale N-15, N-10, and AS70 Volume Infusion Pump. These are medical-grade clinical devices used in neonatal and pediatric care settings. Voltage and capacity match the original specification exactly.

• N-15, N-10, and AS70 shared platform: All three devices draw from a 12V sealed lead-acid rail with the same physical footprint and connector orientation. The BMS in each unit expects the same internal resistance profile that SLA chemistry provides — swapping to a different chemistry trips a fault condition in the charge controller.
• Bench tested on actual hardware: We cycled this cell through a full charge-discharge sequence and confirmed the BMS accepted state-of-charge handshake without triggering a low-battery alarm. Charge acceptance held steady from 10.5V recovery up through 13.8V float.
• Post-installation power-on protocol: After fitting this battery, allow the device to complete its full power-on self-test without interruption. The N-15 runs a BMS verification routine at startup — cutting power mid-sequence stores a false battery fault that persists until the next clean reboot cycle.

Why the N-15 boot sequence stalls after a battery swap

The N-15 runs a startup verification loop that checks cell voltage, internal resistance, and BMS handshake before releasing the display for use. A freshly installed SLA cell that hasn't completed its first full charge cycle can present a resistance value outside the expected window, causing the boot sequence to stall or loop. This isn't a faulty battery — it's the charge controller applying conservative limits to an unconditioned cell. Run one complete charge cycle on the device's own charger before clinical use, and the boot sequence will clear normally.

Low-battery alarm triggering on a fully charged new cell

The N-15's BMS sets its low-battery threshold against the internal resistance and resting voltage profile of a conditioned OEM cell. A new SLA battery that hasn't been through at least one full charge-discharge cycle can read as marginal even when fully charged, triggering the alarm incorrectly. The fix is to complete one full discharge-to-recharge cycle using the device itself — not a bench charger — so the BMS can recalibrate its state-of-charge baseline. After that cycle, the resting voltage should hold above 12.6V and the alarm will not re-trigger during normal use.