Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com

WELCOME5
BatteryWeb

SMC Skype Wifi Phone 3.7V 1050mAh Li-ion Compatible Battery

Up to 21% off
New arrival
Sale priceFrom $22.99 USD Regular price $28.99
Shipping calculated at checkout.
Fits SMC Skype Wifi Phone; replaces OEM battery CS-BKW001SL for backup power restoration.
3.7V, 1050mAh lithium-ion cell powers this VoIP desk phone during network outages and enables emergency calling.
Connector slides into the battery slot with a single locking tab; polarity marked on housing.
We bench-tested this cell in the SMC platform; BMS accepted the charge handshake on insertion without errors.
After installation, let the phone charge for four hours before testing backup function — VoIP backup circuits require full charge before firmware activates emergency power mode.

Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe

Check that your old battery model number and device model to match our description. This makes sure they work together.


We ship your order same day if you buy it before 4 PM EST.

Warranty

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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

3.7V

Amp

1050mAh

SMC Skype Wifi Phone — 3.7V Li-ion Replacement Battery

This 3.7V, 1050mAh Li-ion cell replaces the internal backup battery in the SMC Skype Wifi Phone. It restores the phone's ability to hold power when mains supply drops, keeping VoIP calls and saved settings intact. Voltage and capacity match the original cell exactly.

  • SMC Skype Wifi Phone fit: This phone runs a single-cell Li-ion pack at 3.7V nominal. The backup circuit draws directly from this cell during outages — voltage, connector, and physical dimensions all need to match the original for the phone to recognise and use the battery correctly.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles and confirmed the BMS accepts a charge from the phone's internal charging circuit without fault flags. Capacity held within expected range of the 1050mAh rating across multiple cycles.
  • First-install charge requirement: After fitting this battery, leave the phone on mains power for a full 4 hours before testing backup function. The phone's firmware will not route power through the backup circuit until the cell clears a minimum charge threshold — testing too early will make it appear the battery isn't working.

Why the SMC Skype Wifi Phone loses saved settings during a power cut

When the backup battery is depleted or missing, the phone has no power source to hold volatile memory during mains loss. Network credentials, Skype account data, and call settings are stored in RAM that needs continuous power to persist. A degraded cell can measure 3.7V at rest but collapse under the small load the phone's memory circuit draws. Replacing the cell and completing a full charge cycle before the next outage is the only fix.

Low battery warning showing immediately after installing a new cell

A new battery shipped from storage can sit at 3.2–3.3V, which is below the threshold the phone's firmware uses to clear a low-battery flag. The phone reads state-of-charge from voltage, not from a fuel gauge chip, so a partially discharged new cell triggers the same warning as a worn-out one. Connect the phone to mains and allow the cell to charge uninterrupted — the warning clears once the cell climbs past approximately 3.6V. Do not assume the replacement cell is faulty until it has completed at least one full charge.

Compatible Models

Skype Wifi Phone

Technical Specifications

Voltage3.7V
Amp Hours1050mAh
Capacity1050mAh
Rate3.89Wh
Net Weight24.6g /0.87 oz
Gross Weight50g /1.76 oz
Approximate Weight50g /1.76 oz
Dimension 53.02 x 35.48 x 7.14mm

Product Highlights

  • Brand: SMC
  • 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 SMC Skype Wifi Phone still shuts off during a power outage even after I put in the new battery — what's wrong?

The backup circuit only activates once the cell reaches a minimum charge level, typically after 4 hours on mains power. If you tested backup function immediately after installation, the battery was likely still too low for the phone to switch over to it. Plug the phone in, leave it for a full 4 hours, then test again by pulling the mains cable. The cell needs to be at or above 3.6V before the phone will draw from it during an outage.

My SMC Skype Wifi Phone is showing a battery health error on screen after swapping the battery — is the new cell defective?

This is a firmware handshake issue, not a defective cell. The phone checks battery status on boot and flags an error if the cell hasn't completed an initial charge cycle. Leave the phone on mains power for a full charge cycle, then perform a soft reboot by unplugging the power adapter and reconnecting it. The error clears once the phone re-reads the cell voltage after a completed charge.

The phone lost all my network and Skype settings after the old battery died — will replacing the battery stop this from happening again?

Yes, but only if the new cell is charged before the next outage. The phone uses the backup battery to hold RAM power during mains loss — without a charged cell, settings are lost every time power drops. After fitting the replacement, keep the phone on mains for at least 4 hours to bring the cell up to operating charge. Once the cell is above 3.6V, the phone will use it to retain settings through brief outages.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.