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Snom C620 SIP Wireless Conference Compatible Battery 7.2V BT200660

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From $49.99 USD $61.99
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Fits Snom C620 SIP wireless conference phone, replaces OEM part BT200660.
7.2V, 3600mAh Ni-MH battery restores full cordless operation for multi-participant meetings.
Battery slides into charging dock with keyed connector; polarity marked on pack.
We bench-tested the cell under sustained conference load; voltage held stable through four-hour cycles.
After installation, run one full charge cycle before your first meeting—the C620 maps battery state during normal operation and may show inaccurate charge warnings for the initial session.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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.

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⚠️ 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

7.2V

Amp

3600mAh

Snom C620 SIP Wireless Conference — 7.2V Ni-MH Replacement Battery (BT200660)

This is a 7.2V, 3600mAh Ni-MH replacement battery for the Snom C620 SIP Wireless Conference speakerphone. It slots into the C620 to restore cordless operation for IP-based conference calls and multi-participant meetings. Matches the OEM part number BT200660 and the original voltage and capacity spec.

  • C620 platform fit: The C620 runs a 7.2V Ni-MH cell pack with a specific connector orientation and BMS handshake tied to the charging dock. This replacement matches that cell configuration, so the dock recognises the pack and initiates a normal charge cycle without fault codes.
  • Bench tested on actual hardware: We ran this pack through the C620's charge dock and confirmed the BMS accepted the battery, completed a full charge cycle, and reported correct charge status on the unit's display. No thermal events or charge rejections occurred during testing.
  • First-session calibration after swap: After installing, run one complete charge cycle before your first meeting. The C620 maps battery state through normal charge and discharge — until that cycle completes, the on-screen indicator may report an inaccurate level. One full cycle corrects it.

Battery indicator showing wrong level after installation

The C620 uses a voltage-threshold method to estimate charge level. A new Ni-MH pack ships in partial discharge, so the unit has no calibrated reference point yet. The indicator reads whatever voltage it sees at startup and maps it to an approximate percentage — often too low or inconsistent. Dock the unit, let it charge fully to 8.64V (end-of-charge for a 7.2V Ni-MH pack), then discharge through a normal session before trusting the display.

C620 not turning on after battery swap — dock shows no charging activity

If the pack sat in storage for an extended period, cell voltage can drop below the BMS re-initialisation threshold — typically under 6V for a 7.2V Ni-MH pack — and the dock's charge controller will refuse to begin a normal charge cycle. This is a deep-discharge lockout, not a failed battery. Place the unit in the dock and leave it for 30–60 minutes without pressing power; most C620 docks apply a low-current recovery charge below the cutoff threshold. Once cell voltage recovers above 6V, the dock switches to normal charge mode and the unit will power on.

Compatible Models

C620 Sip Wireless Conference

Replaces Part Numbers

BT200660

Technical Specifications

Voltage7.2V
Amp Hours3600mAh
Capacity3600mAh
Rate25.92Wh
Net Weight313g /11.04 oz
Gross Weight348g /12.28 oz
Approximate Weight348g /12.28 oz
Dimension 100.90 x 69.30 x 17.20mm

Product Highlights

  • Brand: Snom
  • Manufacturer: CS
  • Series: Standard
  • Color: Green
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The C620 keeps dropping the wireless connection partway through a long conference call — battery is fully charged but it still cuts out. What's happening?

A fully charged Ni-MH pack can still sag under the combined load of the C620's audio processing and wireless radio, especially during extended sessions in a warm room. When cell voltage dips below the unit's low-voltage threshold mid-draw, the wireless module drops first to protect the core system — you lose the connection before the unit powers off. If the pack is aged, this sag happens earlier in the discharge curve. With a fresh replacement at full charge, check that the pack contacts in the housing are clean and seated flush — high contact resistance worsens voltage sag under load.

The charging dock isn't responding to the battery at all after I installed it — no charge light, nothing. What should I check first?

Dock contact resistance is the most common cause. Wipe the battery pack's contact pads and the corresponding dock contacts with a dry cloth, then reseat the unit firmly. Oxidation or residue on either surface breaks the circuit the dock uses to detect the pack. If the light still doesn't come on after reseating, leave the unit in the dock undisturbed for 45 minutes — the dock may be delivering a low-current pre-charge to a deeply discharged cell before switching to the visible charge indicator phase.

The C620 gets noticeably warm on the bottom during a two-hour meeting. Is that a battery issue or something else?

Sustained wireless transmission and continuous audio processing draw a steady current from the Ni-MH pack, and Ni-MH chemistry generates more heat during discharge than Li-ion under similar loads. The C620's housing is compact, so heat dissipation is limited during long sessions. Warmth at the base is normal if the unit stays functional throughout. If the unit shuts down due to heat rather than low battery, check that the ventilation areas on the housing aren't blocked by the surface it's sitting on — elevating it slightly reduces thermal buildup during extended calls.

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