About this replacement
Motorola CP110 / EP150 / A10 / A12 — 7.5V Li-ion Replacement Battery (PMNN6035)
This 7.5V 2200mAh Li-ion battery replaces OEM part PMNN6035 and fits the Motorola CP110, EP150, A10, and A12 portable two-way radios. It slots into the same battery bay as the original pack and uses the same connector pinout and BMS handshake protocol. Capacity is drawn from product data: 2200mAh / 16.5Wh.
- CP110 / EP150 / A10 / A12 platform fit: These models share the same 7.5V battery bay, connector footprint, and BMS communication line. One pack covers the full set — no adapter or wiring change needed.
- Bench tested on actual hardware: We ran this pack through transmit-cycle loads on CP110 hardware. The BMS handled PTT current spikes without tripping, and the charger dock accepted the pack after a clean contact seating on first insertion.
- Contact strip seating on first insertion: If the charger dock shows a fault LED after fitting this pack, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly. The CP110 charger requires a clean contact cycle to complete the BMS handshake before it will begin charging.
Why the CP110 drops to reduced TX power mid-shift on a new battery
New Li-ion cells ship at storage voltage — typically around 3.7V per cell — not at a full charge. Under sustained RF output, the radio's power amplifier draws peak current that the storage-voltage cell can't sustain without voltage sag. The radio interprets that sag as a low-battery condition and steps down transmit power automatically. A full charge cycle before the first shift eliminates the sag and restores full RF output.
Bar indicator showing one fewer bar than expected after fitting this pack
The CP110 reads pack voltage against fixed threshold levels to display its bar indicator — it has no fuel-gauge chip, only voltage checkpoints. A new pack at storage voltage sits below the top threshold, so the radio shows one or two bars even though the cell is not depleted. Charge the pack fully in the OEM or compatible dock until the charge LED goes solid green. After a complete charge, open-circuit voltage should read 8.3–8.4V and the radio will display a full bar indicator.