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Diquea EP8100 7.4V Compatible Battery 3400mAh Li-ion

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New arrival
From $47.99 USD $59.99
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Fits EP8100 and EP8000 two-way radios; replaces OEM battery pack EP8100.
7.4V and 3400mAh capacity deliver full RF output on sustained transmit cycles without sag.
Connector seats vertically into radio battery slot with positive terminal up; locking tab clips from below.
We bench-tested the cell against an EP8000 charger dock; BMS accepted handshake on first insertion and charged to full without fault LED.
On first use, if the charger dock shows a fault light, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

7.4V

Amp

3400mAh

Diquea EP8100 / EP8000 — 7.4V Li-ion Replacement Battery

This 7.4V 3400mAh lithium-ion battery replaces the original pack in Diquea EP8100 and EP8000 two-way radios. It matches the OEM voltage rail and connector footprint for both models. Capacity is 3400mAh (25.16Wh) — use the product data figure, not the depleted OEM reading from a worn pack.

  • EP8100 and EP8000 platform: Both models share the same battery bay dimensions, connector pinout, and 7.4V nominal rail. The BMS on each accepts the same charge profile, so one replacement cell covers both devices without any hardware modification.
  • Bench tested on actual hardware: We cycled this pack through PTT transmit loads and monitored the BMS response to sustained RF output. The overcurrent threshold held correctly and the protection circuit did not trip under normal transmit bursts.
  • First-insertion contact check: If the charger dock shows a fault LED on first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly. The EP8000/EP8100 platform requires a clean contact cycle to complete the BMS handshake before charging begins.

Why the EP8100 cuts out mid-transmission on a new battery

A new cell ships at storage voltage — typically 3.7–3.8V per cell, not full charge. When PTT is pressed, transmit current draw spikes sharply. If the cell voltage is already at the low end of storage range, that spike can push the BMS into an overcurrent trip, killing TX mid-keying. Charge the pack fully in the dock before first field use. A full charge brings each cell above 4.1V and gives the BMS headroom to handle the transmit surge without tripping.

Bar indicator showing one fewer bar than expected on a fresh pack

The EP8100 uses a simple voltage-threshold bar display — each bar maps to a voltage band, not a percentage from a fuel gauge chip. A new pack at storage voltage reads one band lower than a fully charged pack, so the display shows one fewer bar even though the cell is not depleted. This is not a faulty battery. Run the pack through a full charge cycle in the dock and the bar indicator will step up to reflect the correct resting voltage above 8.2V.

Compatible Models

EP8100 EP8000

Technical Specifications

Voltage7.4V
Amp Hours3400mAh
Capacity3400mAh
Rate25.16Wh
Net Weight133g /4.69 oz
Gross Weight283g /9.98 oz
Approximate Weight283g /9.98 oz
Dimension 105.90 x 56.20 x 22.55mm

Product Highlights

  • Brand: Diquea
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My EP8100 drops to low TX power partway through a shift even though the battery was fully charged at the start — what's happening?

Sustained RF output draws higher continuous current than standby mode, and if cell impedance is elevated, voltage sags under that load until the radio steps down transmit power to stay within operating range. This is voltage sag under sustained RF output, not a capacity fault. Check the resting voltage after the radio cools — if it reads above 7.6V, the pack still has charge but is struggling under load. Reseat the battery, ensure the contacts are clean, and if sag continues, the dock contact pins may need cleaning to maintain a low-resistance charge path.

The charger dock fault LED never clears after inserting the new Diquea battery — it just keeps blinking and never starts charging.

A persistent fault LED usually means the dock's acceptance circuit is not seeing a valid voltage from the pack — this happens when the cell arrives below the dock's minimum acceptance threshold after extended storage in transit. Remove the battery and measure the pack voltage across the contacts; if it reads below 7.0V, the dock will refuse to charge it. Use a compatible Li-ion charger set to recovery or trickle mode to bring the pack above 7.2V first, then reinsert into the EP8100 dock — the fault LED should clear and charging will begin normally.

The EP8100 radio powers on fine but the BMS trips and shuts the pack down the moment I press PTT — new battery, first day of use.

This is a BMS overcurrent trip caused by the transmit current spike hitting a cell that is still at storage voltage. Storage voltage leaves very little margin before the protection circuit interprets the spike as a fault condition and opens the circuit. Take the pack out, charge it fully in the dock until the charge LED goes green, then reinsert. A fully charged cell above 4.1V per cell gives the BMS enough headroom to absorb the PTT surge without tripping — the radio should key up cleanly after that first full charge.

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