About this replacement
Ritron Generation 3 LoudMouth Receivers — 11.1V Li-ion Replacement Battery (BP-LM-Li22)
This is an 11.1V, 2600mAh lithium-ion battery for the Ritron Generation 3 LoudMouth Receivers. It replaces OEM part BP-LM-Li22 in the receiver unit. Voltage, capacity, and connector position match the original specification.
- Generation 3 LoudMouth platform fit: The Gen 3 LoudMouth series runs an 11.1V three-cell Li-ion pack with a specific BMS handshake tied to the dock acceptance circuit. A mismatched voltage rail or missing BMS signal will trip the dock into fault mode, so cell count and BMS configuration both matter here.
- Bench tested on actual hardware: We cycled this pack through transmit-load draws and confirmed the BMS holds the output rail stable under sustained RF current spikes. Cell balancing across all three cells stayed within tolerance at full charge and at mid-state-of-charge.
- First insertion on a cold pack: If the charger dock shows a fault LED on first insertion, remove the BP-LM-Li22, wipe the contact strip with a dry cloth, and reseat firmly. The Gen 3 dock requires a clean contact cycle to complete the BMS handshake before charging begins.
Why the LoudMouth Gen 3 cuts out mid-transmission on a new BP-LM-Li22
A new pack ships at storage voltage — typically around 3.7V per cell, or roughly 11.1V total — not at full charge. When PTT is pressed, the transmit current draw spikes sharply. If the cells haven't been through a full charge cycle, internal impedance is higher than normal and the BMS may trip the output before the transmission completes. Charge the pack fully before the first use cycle. After one full charge, the BMS calibrates to the cell state and the cutout behaviour stops.
Bar indicator showing one fewer bar than expected after fitting the BP-LM-Li22
The Gen 3 LoudMouth uses a simple voltage-threshold bar indicator — each bar maps to a voltage window across the 11.1V pack. A new cell at storage voltage sits in the lower threshold band, so the radio displays one or two bars even though the pack isn't depleted. This isn't a faulty cell or a mismatch. Put the pack on charge until the dock shows a full-charge status, then reinsert — the indicator will read correctly at 12.6V (4.2V per cell at full charge).