Simoco-Sepura SRP2000 Compatible Battery 7.4V 1800mAh

Simoco-Sepura SRP2000 / SRP3000 Series — 7.4V Li-ion Replacement Battery (300-00002)

This is a 7.4V, 1800mAh lithium-ion battery for the Simoco-Sepura SRP2000, SRP3000, SRC3300, and SRG3500 portable radios. These are professional land mobile radios used across emergency services, security, and enterprise field teams. It replaces OEM part numbers 300-00002, 300-00099, 300-00161, and associated SRP2000KS / SRP2000ES variants.

• SRP2000 and SRP3000 platform compatibility: These models share a common battery bay geometry, connector pinout, and BMS handshake protocol. Swapping between them works because Simoco-Sepura standardised the battery interface across the SRP and SRC/SRG lines in this generation.
• Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on the SRP2000 platform. The BMS accepted the dock handshake on first insertion without fault LED, and cell voltage held within the expected window across low and high transmit loads.
• First-insertion contact check: If the SRP2000 charger dock shows a fault condition on first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly. The SRP platform requires a clean contact cycle to complete the BMS handshake before it will begin charging.

Why the SRP2000 bar indicator reads low on a freshly inserted replacement pack

New lithium-ion cells ship at storage voltage — typically around 3.7V per cell, which puts this 2S pack near 7.4V resting. The SRP2000's voltage-threshold bar indicator reads that as one or two bars, not a full charge. This is not a fault with the battery or the radio. Charge the pack fully in the dock before drawing any conclusions about capacity — bar readings taken at storage voltage are not meaningful.

SRP2000 cuts out or drops transmission mid-PTT press

When PTT is pressed, transmit current spikes sharply — the SRP2000 can draw 1.5A or more at peak RF output. If the battery BMS detects an overcurrent condition, or if cell voltage sags below the radio's cutoff threshold under that load, the radio drops TX. A pack that holds voltage at rest but sags under transmit load is showing cell fatigue, not a BMS fault. Check resting voltage with a multimeter — a healthy cell pair in this pack should read at or above 7.8V after a full charge cycle.