About this replacement
Motorola MTP600 / MTP3000 Series — 3.7V Li-ion Replacement Battery
This 3.7V, 2900mAh Li-ion battery replaces the factory pack in Motorola MTP600, MTP3000, MTP3100, and MTP3150 portable radios, along with eight additional MTP-series models. It slots into the same housing footprint and connects to the same battery contacts as the original. Voltage and capacity match OEM spec exactly — 3.7V, 2900mAh (10.73Wh).
- MTP600 and MTP3000 series compatibility: These models share a common battery housing, contact rail, and BMS handshake protocol across the range. The same pack works across all listed variants because Motorola standardised the connector and communication interface on this platform.
- Bench tested on actual hardware: We cycled this pack through transmit loads on MTP3000 hardware. The BMS held stable under PTT-triggered current spikes and resumed normal voltage within expected bounds after each burst.
- First insertion contact check: If the charger dock shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The MTP platform requires a clean contact cycle before the dock will accept the BMS handshake and begin charging.
Why the MTP600 cuts out mid-transmission on a new battery
A new Li-ion cell ships at storage voltage — typically around 3.6–3.7V — not at full charge. When the radio transmits, the RF amplifier draws a sharp current spike. If the cell hasn't been fully charged first, that spike can pull the pack voltage below the BMS undervoltage threshold, triggering a momentary cutoff. The radio interprets this as a low-battery condition and drops the transmission. Charge the pack to full before putting it into service.
Bar indicator showing one fewer bar than expected on a fresh pack
The MTP series uses a simple voltage-threshold bar display — each bar maps to a voltage band, not a percentage calculated by a chip. A new pack sitting at storage voltage will read one or even two bars low until it's fully charged. This is not a fault with the cell. Fully charge the battery in the dock, then reinsert it into the radio — the indicator will reflect the correct voltage level at 4.1–4.2V.