# Uninterruptible Power Supply UPS ONLINE USV-Systeme YUNTO Smile 400

**URL:** https://aio.lv/en/product--online-usv-systeme-ys400--3503690
**Data updated:** 2026-01-13 17:43 (EET)
**Category:** UPS
**Manufacturer:** ONLINE USV-Systeme
**Manufacturer code:** YS400
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 67.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 56.19 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--online-usv-systeme-ys400--3503690

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.99 EUR |
| Courier delivery to door | 21.07.2026 | 8.62 EUR |

## Summary description

The ONLINE USV-Systeme YUNTO Smile 400 is a Line-Interactive UPS with a capacity of 0.4 kVA and 240 W output power. It features 2 AC outlets, a 4.5 Ah battery, and a 12 V battery voltage, providing a typical backup time of 7 minutes at half load. The tower form factor and LCD display make it user-friendly. Ideal for protecting sensitive electronic equipment from power interruptions.

## Long description

The ONLINE USV-Systeme YUNTO Smile 400 is a Line-Interactive uninterruptible power supply (UPS) designed to protect small office and home electronics from power interruptions. With a rated capacity of 0.4 kVA (400 VA) and an output power of 240 W, this tower-style UPS provides short-term battery backup and voltage regulation for sensitive devices. The unit includes two AC outlets, a 12 V internal battery with 4.5 Ah capacity and an LCD display that shows operating status and basic diagnostics. Typical backup time is approximately 7 minutes at 50% load, allowing for safe shutdown or continued operation of essential equipment during brief outages.
Advantages
The YUNTO Smile 400 combines compact tower design with straightforward user controls and a clear LCD for real-time information. Its Line-Interactive topology provides automatic voltage regulation to handle minor sags and surges without switching to battery, which increases battery life and reduces unnecessary transfers. The included 4.5 Ah, 12 V battery delivers reliable short-duration backup for routers, modems, NAS devices, desktop PCs, and other sensitive electronics. The device is intended for easy placement in small workspaces and requires minimal setup.
Suitable for
 Protecting a home or small office desktop PC and monitor
 Backup for network equipment such as routers and modems
 Power protection for small NAS units and external hard drives
 Maintaining VoIP phones, POS terminals, or small office peripherals during short outages
Key specifications
 Topology: Line-Interactive UPS
 Apparent power: 0.4 kVA (400 VA)
 Rated output power: 240 W
 Battery type: Sealed lead-acid battery, 12 V, 4.5 Ah
 Typical backup time: ~7 minutes at 50% load
 Outlets: 2 AC outlets
 Form factor: Tower
 Display: LCD status display
 Input/Output voltage: compatible with standard mains voltages (AC)
How to use
Place the UPS on a stable, level surface near the equipment to be protected and close to a grounded mains outlet. Connect the UPS to mains power and allow the internal battery to charge fully before relying on battery backup. Plug critical devices into the provided AC outlets. Use the LCD display to monitor input voltage, battery status, and load conditions. During an outage, the unit will switch to battery power automatically; observe the remaining run time and perform an orderly shutdown of nonessential equipment if required. Replace the internal battery according to the manufacturer’s maintenance schedule or when capacity noticeably declines.
Usage recommendations
For best results, avoid operating the UPS in enclosed, unventilated spaces and keep it away from direct heat sources and moisture. Regularly test the unit under load and follow the battery replacement guidance to ensure consistent backup availability. Match connected device power draw to the UPS rated output (240 W) and avoid prolonged operation near the maximum load to preserve battery life and reduce wear.

## Specifications

### Ports & interfaces

| Feature | Value |
|---|---|
| AC outlets quantity | 2 AC outlet(s) |
| USB port | Yes |

### Battery

| Feature | Value |
|---|---|
| Number of batteries supported | 1 |
| Battery recharge time | 6 h |
| Typical backup time at half load | 7 min |
| Battery voltage | 12 V |
| Battery capacity | 4.5 Ah |

### Design

| Feature | Value |
|---|---|
| Product colour | Black |
| Form factor | Tower |
| Display type | LCD |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 3.7 kg |
| Height | 142 mm |
| Width | 101 mm |
| Depth | 300 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 0 - 90 |
| Storage temperature (T-T) | 15 - 50 |
| Operating temperature (T-T) | 0 - 40 |
| Storage relative humidity (H-H) | 0 - 90 |

### Features

| Feature | Value |
|---|---|
| Audible alarm(s) | Yes |
| Output power capacity | 0.4 kVA |
| Noise level | 40 dB |
| Output power | 240 W |
| Input operation voltage (max) | 290 V |
| Input operation voltage (min) | 162 V |
| Output operation voltage (min) | 207 V |
| Output operation voltage (max) | 253 V |
| UPS topology | Line-Interactive |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 85078000 |

## FAQ

### How much does the UPS ONLINE USV-Systeme YUNTO Smile 400 cost, and is it available for purchase?

The price is 67.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 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 16.07.2026 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. 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 ONLINE USV-Systeme 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 ONLINE USV-Systeme 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: ac outlets quantity, weight, output power, output power capacity, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/3503690/64217209_large.webp