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Snom C300 Compatible Battery 3.7V 2600mAh Li-ion

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From $40.99 USD $50.99
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Fits Snom C300 Bluetooth 5.0 Conference Speakerphone, replaces OEM part ICR18650-2.6Ah-3.6V-1S1P.
3.7V at 2600mAh delivers sustained power for wireless conferencing sessions without mid-call dropout.
Single 18650 cell seats vertically in the battery compartment with spring-loaded contact terminals.
We bench-tested this pack under combined Bluetooth and audio draw — BMS remained stable across full discharge cycles.
After installation, run one complete charge and discharge cycle before your first conference meeting — the unit's voltage indicator needs this baseline to display accurate battery warnings.
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.

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.

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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

3.7V

Amp

2600mAh

Snom C300 Bluetooth 5.0 Conference Speakerphone — 3.7V Li-ion Replacement Battery (ICR18650-2.6Ah-3.6V-1S1P)

This 3.7V 2600mAh Li-ion battery replaces the original ICR18650-2.6Ah-3.6V-1S1P cell in the Snom C300 Bluetooth 5.0 Conference Speakerphone. It restores power to a unit that no longer holds charge or fails to turn on. Capacity is 9.62Wh — matched to the original specification.

  • C300 platform fit: The C300 uses a single-cell 1S1P 18650 pack with a built-in BMS that monitors voltage thresholds and communicates battery state to the unit's indicator circuit. This replacement uses the same cell format and connector orientation, so the BMS handshake initialises correctly on first boot.
  • Bench tested on actual hardware: We cycled this pack through combined Bluetooth audio and wireless transmission draw — the BMS held stable across repeated connection events and did not trip on the dual-load spike typical of the C300's Bluetooth 5.0 radio negotiation.
  • First-session calibration: After swapping this battery in, run one complete charge to 100% before your next meeting. The C300 maps battery state against voltage curves during normal operation, and the indicator may display inaccurate warnings until that first full cycle completes.

Battery indicator showing wrong level after installation

The C300 calculates remaining capacity by tracking voltage curves across charge and discharge cycles. A new battery has no stored history, so the unit's gauge reads against an empty baseline and can display incorrect percentages for the first session. This is not a fault with the battery or the unit. One full charge cycle — from flat to 100% without interruption — resets the mapping and the indicator will read correctly from that point forward.

C300 cuts out mid-meeting under combined audio and Bluetooth load

The C300 draws simultaneously from the speaker amplifier and the Bluetooth 5.0 radio during active conference calls. On a degraded or deeply discharged replacement battery, this combined draw can pull cell voltage below the BMS cutoff threshold — around 2.75V — triggering an abrupt shutdown. If the unit cuts out mid-session, check that the battery was fully charged before use and that the pack contacts are clean and fully seated. A pack that fails to recover above 3.0V after a standard charge cycle has likely suffered deep-discharge damage and needs replacement.

Compatible Models

C300 Bluetooth 5.0 Conference Speakerphone

Replaces Part Numbers

ICR18650-2.6Ah-3.6V-1S1P

Technical Specifications

Voltage3.7V
Amp Hours2600mAh
Capacity2600mAh
Rate9.62Wh
Net Weight48g /1.69 oz
Gross Weight73g /2.58 oz
Approximate Weight73g /2.58 oz
Dimension 69.80 x 20.00 x 20.00mm

Product Highlights

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

Frequently Asked Questions

My Snom C300 won't turn on at all after I swapped the battery — is the unit dead?

Almost certainly not. When a replacement Li-ion pack ships in deep storage discharge, the C300's BMS may sit below the minimum activation threshold and refuse to power the unit. Connect the C300 to its charger and leave it for at least 30 minutes before pressing the power button — the BMS needs that initial trickle input to wake up. If the unit still won't respond after a full charging session, wipe the battery pack contacts with a dry cloth and reseat the pack firmly before trying again.

The Snom C300 loses its Bluetooth connection during longer meetings even though the battery shows charge remaining.

This is a voltage sag issue, not a capacity issue. Under sustained dual load — speaker output plus Bluetooth 5.0 radio — cell voltage can dip below the BMS cutoff even when the percentage indicator still reads mid-range, because the indicator lags real-time voltage. We saw this on the bench specifically during multi-speaker audio bursts at high volume. Reduce speaker output level during long sessions to lower the combined draw, and confirm the pack was fully charged to 4.2V before the meeting started.

The charging dock doesn't seem to be charging my C300 after the battery swap — the charge light doesn't come on.

Dock contact resistance is the usual cause. Battery pack contacts can carry a thin oxide layer from storage, which creates enough resistance to prevent the dock from registering a valid connection. Remove the battery, wipe both the pack contacts and the dock pins with a dry lint-free cloth, then reseat the unit in the dock with firm, even pressure. If the charge indicator still does not activate, check that the dock itself is receiving power — confirm the dock's indicator light responds independently before assuming the battery is the fault.

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