About this replacement
Alinco DJ-S45T Series — 3.7V Li-ion Replacement Battery (EBP-60)
This is a 3.7V Li-ion replacement battery for the Alinco DJ-S45T handheld two-way radio and its variants, including the DJ-S45TE, DJ-S45TCQL, and DJ-S45TCQS. It carries the OEM part number EBP-60 and a capacity of 700mAh (2.59Wh). The pack slots directly into the same battery bay as the original and uses the same contact layout.
- DJ-S45T series compatibility: The DJ-S45T variants — TE, TCQL, TCQS and others in the line — all share the same 3.7V single-cell architecture and identical connector footprint. The BMS handshake protocol is the same across the series, so one pack covers the full range without modification.
- Bench tested on actual hardware: We ran this pack through the DJ-S45T charge and transmit cycle. The BMS accepted the charger dock handshake on first insertion, held voltage within spec across repeated PTT events, and triggered overcurrent protection cleanly when we forced a load spike above threshold.
- 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 EBP-60 dock requires a clean contact cycle to complete the BMS handshake before charging begins — this is not a faulty cell.
Why the DJ-S45T cuts out mid-transmission on a new EBP-60
The DJ-S45T draws a sharp current spike the moment PTT is pressed — RF output demands significantly more current than standby mode. If the replacement pack ships at storage voltage (typically around 3.6–3.7V), the BMS can interpret the transmit surge as an overcurrent event and trip the protection circuit. This is a BMS response to low initial cell charge, not a defective pack. Run one full charge cycle before transmitting, and the cutout behaviour stops.
Bar indicator showing one fewer bar than expected after fitting the EBP-60
The DJ-S45T uses voltage-threshold bar indicators — each bar corresponds to a fixed voltage band, not a fuel gauge chip. A new cell delivered at storage voltage sits near the lower threshold, so the radio correctly reads one bar until charge rises. This is not a capacity fault. Fully charge the pack first, then check the indicator — it should read at the top threshold band once the cell reaches 4.1–4.2V.