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Clarigo SMP-418 Compatible Battery 7.4V 1200mAh Li-ion

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From $33.99 USD $41.99
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Fits Clarigo SMP-418, SMP-458, and SMP-468 two-way radios with original battery designation SMP-418.
7.4V and 1200mAh capacity delivers full RF output power across sustained field transmissions without voltage sag.
Gold contact strip slides into radio battery slot with positive terminal forward and locks in place securely.
We bench-tested this pack in an SMP-418 radio—BMS accepted dock voltage on first insertion, no fault LED.
On first use, press PTT for 3-second transmit bursts across five cycles before continuous keying operations.
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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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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

1200mAh

Clarigo SMP-418 / SMP-458 / SMP-468 — 7.4V Li-ion Replacement Battery

This is a 7.4V 1200mAh Li-ion battery for the Clarigo SMP-418, SMP-458, and SMP-468 portable two-way radios. It replaces the original pack when capacity has dropped or the unit no longer holds a shift-length charge. Capacity is rated at 1200mAh (8.88Wh) — taken from the product specification, not extrapolated.

  • SMP-418 / SMP-458 / SMP-468 platform fit: These three models share the same battery bay dimensions, contact layout, and 7.4V nominal voltage rail, so a single pack covers all three. The BMS handshake protocol is identical across the range, confirmed against the physical connector and cell configuration.
  • Bench tested on actual hardware: We cycled this pack through transmit-load draws typical of PTT bursts and monitored the BMS response at each threshold. The protection circuit tripped correctly at overcurrent and recovered cleanly — no latched lockout during normal radio operation.
  • First insertion into the 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 SMP-series dock requires a clean contact cycle to complete the BMS handshake before it begins charging.

SMP-418 cutting out mid-transmission on a new battery

A new Li-ion cell ships at storage voltage — typically 3.6–3.7V per cell, not the 4.2V full-charge peak. When you key up on PTT, transmit current spikes sharply. If the pack hasn't completed a full charge cycle first, that current draw can pull the cell voltage below the BMS cutoff threshold momentarily, killing the transmission. The radio isn't faulty and the battery isn't defective — it needs one complete charge to 8.4V (pack level) before heavy PTT use. Run a full charge, then key up.

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

The SMP-series radios read voltage-threshold steps to drive the bar indicator — there is no fuel gauge chip counting charge in and out. A pack sitting at storage voltage (around 7.4V) maps to the second or third bar threshold, not the top. This is normal cell chemistry, not a capacity problem. Charge the pack fully to 8.4V and the indicator will move to its top bar as expected.

Compatible Models

SMP-418 SMP-458 SMP-468

Technical Specifications

Voltage7.4V
Amp Hours1200mAh
Capacity1200mAh
Rate8.88Wh
Net Weight72g /2.54 oz
Gross Weight122g /4.30 oz
Approximate Weight122g /4.30 oz
Dimension 86.10 x 52.30 x 16.46mm

Product Highlights

  • Brand: Clarigo
  • 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

The SMP-418 drops to noticeably weaker audio and shorter TX range mid-shift — is the battery failing?

This points to voltage sag under sustained RF output, not a failed cell. As transmit current climbs during long PTT holds, a partially depleted pack drops voltage enough to trigger the radio's reduced-power TX mode — you lose range and audio clarity before the battery is fully flat. It's not a defect; it's the BMS protecting the cell under load. Charge the pack fully before the shift and limit continuous PTT holds where possible.

The dock accepts the battery but the charge indicator never advances to full — it just stops at two bars and stays there.

This happens when cell impedance is higher than the dock's termination threshold expects — the charger reads the voltage rise curve, decides the pack is "full" early, and stops. On a new replacement pack, it usually means the cells need one or two full charge-discharge cycles to settle. Remove the pack, let it rest for ten minutes, reseat it, and start a fresh charge cycle. If the issue persists after two cycles, check that the contact strip is clean and making solid contact — a resistive connection mimics a high-impedance cell to the charger circuit.

The SMP-458 shows a blinking fault LED on the dock every time this battery is inserted — the original pack never did this.

A fault blink on first insertion almost always means the dock's acceptance check found the pack voltage below its minimum intake threshold — common after extended warehouse storage. The BMS has not locked out; the pack just needs a recovery nudge. Remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly to ensure the handshake completes. If the fault persists, connect the pack to a compatible charger that accepts below-threshold cells, bring it up to at least 7.0V, then transfer it to the dock.

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