Excera EB242L 7.4V Replacement Battery for EP8000 Radio 3400mAh

Excera EP8000 / EP8100 — 7.4V Li-ion Replacement Battery (EB242L / EB342L)

This 7.4V Li-ion battery at 3400mAh (25.16Wh) replaces the Excera EB242L and EB342L packs for the EP8000 and EP8100 portable two-way radios. It fits the same battery bay and connector as the original, with a BMS that communicates correctly with the radio's charge management circuit. Dimensions are 105.90 × 56.20 × 22.55mm — confirm against your current pack before ordering.

• EP8000 and EP8100 platform fit: Both models share the same battery bay dimensions, voltage rail, and connector pinout, which is why a single pack covers both. The BMS is matched to the 7.4V nominal operating window the EP8000 and EP8100 radios expect — the radio's charge circuit will recognise the pack and proceed through the full charge cycle without a forced cutoff.
• Bench tested on actual hardware: We cycled this pack under a simulated PTT transmit load — the sustained current draw a two-way radio pulls during active transmission. The BMS held the voltage rail steady through repeated keying events and did not trigger an overcurrent lockout at any point in testing.
• First insertion into the dock: If the charger dock shows a fault or blink pattern on first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat it firmly. The EP8000 dock requires a clean contact cycle to complete the BMS handshake before charging begins — this is not a fault with the pack.

Why the EP8000 cuts out mid-transmission on a new battery

A new Li-ion pack ships at storage voltage — typically 3.6–3.7V per cell, not the 4.2V per cell it reaches after a full charge. When the EP8000 keys up to transmit, it draws a sharp current spike. If the pack is at storage voltage, its internal impedance is higher than at full charge, and the voltage sag under that spike can drop far enough to trip the radio's undervoltage protection. The radio interprets this as a low-battery condition and cuts RF output or drops off entirely. Charge the pack fully before the first transmission session — the dock's green indicator confirms the pack has reached the correct resting voltage.

Bar indicator showing one fewer bar than expected after fitting the EB242L

The EP8000 uses a voltage-threshold bar indicator — each bar maps to a voltage window, not a percentage tracked by a fuel gauge chip. A new pack at storage voltage sits at roughly 3.70V per cell, which places it in the second or third bar range rather than the top. This is normal behaviour for a pack that has not yet been fully charged. After a complete charge cycle, the resting voltage climbs to approximately 4.15–4.20V per cell and the indicator will show the expected full reading.