About this replacement
Rexon RL328 / LIS2010 Series — 7.2V Li-ion Replacement Battery (BP-17L)
This 7.2V, 2000mAh Li-ion battery replaces the BP-17L, BP-21L, and BP-24L packs in Rexon portable two-way radios. It fits the RL328, LIS2010, LIS201, and LIS2013 models. Voltage and capacity figures match the original Rexon specification exactly.
- RL328 / LIS-series platform fit: These four models share the same 7.2V power rail, battery footprint, and contact layout. The BMS handshake protocol is identical across the group, so one pack covers all four without modification.
- Bench tested on actual hardware: We ran this pack through full charge cycles and repeated PTT transmit loads on the RL328. The BMS held stable during transmit current spikes and did not trip under sustained RF output draws.
- First insertion into the Rexon dock: If the charger dock shows a fault LED on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Rexon dock requires a clean contact cycle to complete the BMS handshake before charging begins.
Why the RL328 drops to reduced TX power mid-shift on a new BP-17L
A new Li-ion cell ships at storage voltage — typically 3.6–3.7V per cell, not full charge. At that level, the radio's voltage threshold logic scales back transmit power to protect the RF output stage. This is not a faulty pack. A full charge cycle brings each cell to 4.2V and resolves the TX power reduction immediately. Do not assume the replacement is defective until one complete charge has finished.
RL328 bar indicator showing one fewer bar than expected after pack swap
The RL328 uses a simple voltage-threshold bar display, not a fuel gauge chip. At storage voltage, the radio reads the pack as partially depleted and shows one or two bars instead of full. This clears after the first full charge brings the pack to rated voltage. If the bar count stays low after a confirmed full charge, check that the dock contacts are clean and measure terminal voltage — a healthy fully-charged pack should read 8.2–8.4V across the terminals.