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Somfy 1824029 Smart Home Compatible Battery 3.7V 2100mAh

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From $49.99 USD $61.99
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Fits Somfy 1824029 motorized shade controllers and TaHoma Pad io hubs; replaces OEM battery 1824029.
3.7V, 2100mAh lithium-polymer delivers full capacity to motorized blinds, roller shades, and awning actuators without voltage sag.
Connector mates flush with Somfy's vertical battery slot; polarity marked on pack body; no locking tab required.
We bench tested this cell in a TaHoma Pad io unit — BMS accepted the pack on first insertion with clean voltage ramp to 3.7V nominal.
After installation, wait 60 seconds before expecting reconnection; Somfy devices perform a mesh network re-join sequence after power interruption that cannot be rushed.
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.

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

2100mAh

Somfy TaHoma Pad io — 3.7V Li-Polymer Replacement Battery (1824029)

This 3.7V, 2100mAh lithium-polymer cell replaces the internal battery in Somfy's TaHoma Pad io smart home controller. The TaHoma Pad io acts as the hub for Somfy motorized blinds, roller shades, and awning controllers. When the original cell degrades, the unit loses its ability to maintain schedules and respond to remote commands.

  • TaHoma Pad io platform fit: The 1824029 part number covers both the TaHoma Pad io and related Somfy io-homecontrol gateway variants. These units share the same flat Li-Polymer cell form factor, 3.7V nominal rail, and internal BMS handshake — swapping to a mismatched cell triggers a low-voltage lockout before the device boots.
  • Bench tested on actual hardware: We cycled this cell through the TaHoma Pad io's BMS verification sequence and confirmed stable voltage delivery across standby draw and active command broadcast states. The BMS accepted the cell without fault codes.
  • Post-swap network re-join: After fitting this battery, hold off on triggering any shades or awnings for at least 60 seconds. The TaHoma Pad io runs a full io-homecontrol mesh re-join sequence on every power restoration — sending commands before that completes causes the unit to queue them incorrectly or drop them entirely.

Why the TaHoma Pad io goes offline immediately after a battery swap

The TaHoma Pad io does not resume its prior network state after power loss — it re-negotiates its position in the io-homecontrol mesh from scratch. This process involves broadcasting a discovery packet, waiting for acknowledgment from paired motors, and re-registering with the cloud relay. If the app shows the device offline 90 seconds after the swap, the mesh re-join has stalled rather than completed, and a manual re-pair through the TaHoma app is the next step.

Low battery alert showing immediately after fitting a new cell

Li-Polymer cells lose voltage during storage — a cell sitting in a warehouse at 3.4V will trigger the TaHoma Pad io's low-battery alert, which fires below 3.5V. The device is not faulty and the cell is not defective. Connect the TaHoma Pad io to its USB supply for at least two hours to bring the cell up to its nominal 3.7V operating range. Once above the alert threshold, the warning clears automatically.

Compatible Models

1824029 TaHoma Pad io Tahomi Pad io

Replaces Part Numbers

18024029 1824029

Technical Specifications

Voltage3.7V
Amp Hours2100mAh
Capacity2100mAh
Rate7.77Wh
Net Weight37g /1.31 oz
Gross Weight62g /2.19 oz
Approximate Weight62g /2.19 oz
Dimension 72.40 x 55.40 x 3.90mm

Product Highlights

  • Brand: Somfy
  • Manufacturer: CS
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My TaHoma Pad io is showing all my shades as unresponsive after I replaced the battery — what's happening?

The TaHoma Pad io loses its active motor registry on every power interruption and has to re-discover each paired device on the io-homecontrol mesh. This takes up to 90 seconds after the unit boots. If shades are still unresponsive after two minutes, open the TaHoma app, go to Settings, and manually trigger a device search to force the hub to re-poll its paired motors.

The battery I just installed seems to be draining much faster than the original — is something wrong?

Fast drain on the TaHoma Pad io usually points to a high polling interval set in the app, not a faulty cell. If the hub is set to check motor status or sync schedules every few minutes, it never enters deep standby and the cell runs down quickly. Open the TaHoma app, navigate to the device's advanced settings, and extend the polling interval — dropping from 5-minute to 15-minute checks cuts average idle draw significantly.

The TaHoma Pad io won't reconnect to the TaHoma app even after waiting — the hub light is on but the app says it's offline.

A solid power light with an app-side offline status means the hub completed its local boot but failed to re-register with Somfy's cloud relay — this is a different failure from a mesh re-join stall. It usually happens when the hub's stored session token expires during the power gap. In the TaHoma app, delete the hub from your account, then re-add it using the device's serial number printed on the base — re-pairing issues a fresh session token and restores cloud connectivity.

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Somfy 1824029 Replacement Battery, 3.7V, 2100mAh, Li-Polymer 1

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