# Shelly H&T USB Add-on Power Adapter for Indoor Use

**URL:** https://aio.lv/en/product--shelly-shellyhtadds--10631596
**Data updated:** 2026-06-27 08:56 (EEST)
**Category:** Other goods
**Manufacturer:** Shelly
**Manufacturer code:** Shelly\_HT\_Add\_s
**EAN:** 3800235266014
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 9.49 €
**Prices and availability valid until:** 2026-08-01 23:59
**Price without VAT (21%):** 7.84 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--shelly-shellyhtadds--10631596

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.07.2026 | free |
| Pickup points | 27.07.2026 | 1.89 EUR |
| Courier delivery to door | 27.07.2026 | 4.99 EUR |

## Summary description

The Shelly H&T USB Add-on is a dedicated indoor power adapter designed to provide a constant power supply to Shelly H&T sensors. It features an input voltage of 5V and an output voltage of 3V, housed in a durable black plastic casing. This accessory eliminates the need for batteries, ensuring reliable and continuous operation for your smart home humidity and temperature monitoring devices.

## Long description

The Shelly H&T USB Add-on is a specialized power adapter engineered to provide a consistent and reliable power supply to Shelly H&T humidity and temperature sensors. By replacing traditional battery power with a stable wired connection, this accessory ensures that your smart home monitoring devices remain operational at all times without the need for periodic battery replacements. The unit is designed specifically for indoor environments and features a robust black plastic housing that integrates seamlessly with your existing smart home setup.
Advantages
This power adapter significantly enhances the reliability of your Shelly H&T sensors by eliminating the downtime associated with battery depletion. It provides a constant voltage output, which is essential for maintaining accurate sensor readings and consistent connectivity within your smart home network. The installation process is straightforward, allowing for a permanent power solution that is both cost-effective and environmentally friendly by reducing battery waste. Its compact design ensures that it does not interfere with the placement or aesthetics of your sensors.
Suitable for
Continuous temperature and humidity monitoring in residential indoor spaces
Smart home setups requiring high-frequency data reporting from sensors
Users looking to eliminate battery maintenance for Shelly H&T devices
Indoor environments where a USB power source is readily accessible
This adapter is not suitable for outdoor use or areas exposed to moisture, extreme temperatures, or direct weather conditions. It is also not compatible with devices other than the specified Shelly H&T sensor models.
Key specifications
Input voltage: 5V
Output voltage: 3V
Housing material: Durable plastic
Color: Black
Usage environment: Indoor only
To use the Shelly H&T USB Add-on, simply remove the battery cover from your compatible Shelly H&T sensor and connect the adapter according to the provided instructions. Ensure that the USB cable is connected to a stable 5V power source. Once connected, the sensor will draw power directly from the adapter, allowing for continuous operation without the need for batteries. Verify that the sensor is correctly seated and that the power connection is secure to ensure uninterrupted data transmission.
What to consider before purchase
Ensure your Shelly H&T sensor model is compatible with this specific add-on
Verify that a 5V USB power source is available near the intended installation location
Confirm that the installation area is strictly indoors and protected from humidity
For optimal performance, ensure that the USB power adapter used provides a stable 5V output and is connected to a reliable power source to prevent intermittent sensor connectivity.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.007 kg |
| Power supply type | Indoor |
| Operating relative humidity (H-H) | 30 - 90 |
| Compatibility | Shelly H&T |
| Operating temperature (T-T) | -10 - 50 |
| Height | 46 mm |
| Input voltage | 5 |
| Output voltage | 3 |
| Width | 46 mm |
| Depth | 17 mm |
| Product colour | Black |
| Housing material | Plastic |
| Quantity per pack | 1 pc(s) |
| Suitable for indoor use | Yes |

## FAQ

### How much does the Shelly H&T USB Add-on Power Adapter cost, and is it available for purchase?

The price is 9.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 20 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 22.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Shelly products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Shelly service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/10631596/61761893_large.webp