Harris XL-185P Two-Way Radio Replacement Battery 7.4V 4800mAh

Harris XL-185P / XL-200P Series — 7.4V Li-ion Replacement Battery (14035-4010-04)

This 7.4V, 4800mAh Li-ion battery replaces the original pack in Harris XL-185P, XL-185Pi, XL-200P, and XL-200Pi portable radios. It matches the OEM voltage rail and connector footprint used across the XL series. Capacity figure is from the product specification — 35.52Wh total energy.

• XL-185P and XL-200P platform fit: Both the P and Pi variants of these Harris portables share the same battery bay dimensions, contact layout, and 7.4V power rail. The BMS in each variant performs the same handshake sequence on insertion, so one pack services all four listed models without modification.
• Bench tested on actual hardware: We cycled this pack through full charge and load discharge on a Harris XL-series body. The BMS held voltage within spec under simulated transmit loads and triggered low-voltage cutoff cleanly without latching — the pack recovered to normal charge acceptance immediately after.
• First insertion into Harris dock: If the charger shows a fault LED on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Harris charging dock requires a clean contact cycle to complete the BMS handshake before it begins the charge sequence — this is a contact recognition step, not a fault with the battery.

Why the XL-185P drops to reduced TX power mid-shift on a new battery

Harris XL-series radios throttle transmit output when bus voltage sags below a set threshold during PTT events. A new pack shipped at storage voltage — typically 3.7–3.8V per cell — has higher internal impedance than a fully conditioned cell. Under the current spike of a transmit event, that impedance causes a brief voltage dip the radio interprets as a low-battery condition, triggering power reduction. Running one full charge-discharge cycle before field deployment drops cell impedance and eliminates the sag. After that cycle, the pack holds voltage through sustained RF output without throttling.

Bar indicator showing one fewer bar than expected after fitting a new 14035-4010-04

The XL-series bar indicator reads pack voltage against fixed thresholds — it does not track charge history. A new cell delivered at storage voltage sits at roughly 3.7V per cell, which the radio maps to the second or third bar rather than full. This is not a capacity fault. Charge the pack fully in the Harris dock until the charge LED goes solid green, then check the indicator — it should read at the top bar at 8.2–8.4V resting voltage.