EBP-101 Alinco DJ-VX50HE Replacement Battery 7.4V 1800mAh

Alinco DJ-VX50HE / DJ-VX46 Series — 7.4V Li-ion Replacement Battery (EBP-101)

This is the EBP-101 Li-ion battery pack for the Alinco DJ-VX50HE, DJ-VX50T, DJ-VX46, DJ-VX10, and four additional compatible models. It runs at 7.4V with a capacity of 1800mAh (13.32Wh). The pack slots directly into the same bay as the original EBP-101 and uses the same connector and contact layout.

• DJ-VX50 and VX46 platform compatibility: These models share the same battery bay geometry, 7.4V voltage rail, and BMS handshake protocol. The EBP-101 footprint is consistent across the DJ-VX10 through DJ-VX50 line, so one pack covers the full group without adapter modifications.
• Bench tested on actual hardware: We cycled this pack through transmit loads on a DJ-VX50HE body and monitored BMS response under sustained PTT draw. The protection circuit held cutoff thresholds without false trips, and cell balance across both cells stayed within spec through the full discharge curve.
• First insertion into the Alinco charger dock: If the dock LED shows fault on first insertion, remove the pack and wipe the gold contact strip with a dry cloth before reseating. The Alinco dock requires a clean contact cycle to register the new BMS before accepting charge — a single wipe and firm reseat resolves this in most cases.

Why the DJ-VX50HE cuts out mid-transmission on a fresh EBP-101

A new Li-ion cell ships at storage voltage — typically 3.6–3.7V per cell, not the 4.2V full-charge peak. When the radio fires a transmit burst, current draw spikes sharply. If the pack hasn't completed at least one full charge cycle, internal resistance is slightly elevated and voltage can sag enough to trigger the BMS undervoltage cutoff during that spike. The fix is straightforward: charge the pack fully before the first field use. After one complete charge-discharge cycle, the BMS settles and the cutoff threshold behaves as expected under normal TX load.

Bar indicator showing one fewer bar than expected after inserting a new EBP-101

The DJ-VX50HE uses a voltage-threshold bar indicator — it reads pack voltage against fixed steps and displays bars accordingly. A new pack at storage voltage sits below the top threshold, so the radio displays one or two bars even though the cell capacity is intact. This is not a fault with the pack. Charge the battery fully in the Alinco dock until the LED shows green, then reinsert — the indicator should read full bars at or above 8.3V under no-load conditions.