# Lead-acid battery FIAMM FG21803 12V 18Ah — sealed rechargeable battery for backup and UPS

**URL:** https://aio.lv/en/product--fiamm-07959--3520863
**Data updated:** 2025-12-29 10:59 (EET)
**Category:** UPS Batteries
**Manufacturer:** FIAMM
**Manufacturer code:** 07959
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 65.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 54.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fiamm-07959--3520863

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

FIAMM FG21803 is a sealed lead-acid rechargeable battery with nominal voltage 12V and capacity 18Ah. Designed for backup power applications such as UPS systems, alarm panels and telecom equipment, it provides reliable short-term energy storage and emergency power. Maintenance-free, rechargeable and suitable for upright or side mounting depending on installation requirements.

## Long description

FIAMM FG21803 is a sealed lead-acid rechargeable battery with a nominal voltage of 12 V and a capacity of 18 Ah. It is maintenance-free and hermetically sealed, allowing operation in any orientation without the need for servicing. The grid alloy of lead, tin and calcium provides stable performance and extended service life. Typical applications include UPS backup systems, alarm and security panels, telecom equipment and emergency lighting.
Advantages
The FIAMM FG21803 offers a five-year design life and is maintenance-free thanks to its sealed construction. Its lead–tin–calcium grid alloy improves corrosion resistance and long-term capacity retention. The battery is rechargeable and suitable for both upright and side installation, providing flexible mounting options for various backup power systems.
Suitable for
UPS backup systems
Alarm and security systems (EZS)
Telecommunications equipment
Emergency and exit lighting
Portable warning and signaling devices
Key specifications
Model: FIAMM FG21803
Type: Sealed lead-acid (SLA), rechargeable
Nominal voltage: 12 V
Capacity: 18 Ah
Design life: 5 years
Dimensions (L×W×H): 181 × 76 × 167 mm
Maintenance: Maintenance-free, hermetically sealed
How to use
Install the FIAMM FG21803 in accordance with the equipment manufacturer’s instructions and applicable safety standards. Connect the battery using appropriate terminal hardware and charging equipment designed for 12 V lead-acid batteries. The sealed design permits mounting in upright or side positions; avoid permanent inverted installation unless the equipment manufacturer explicitly allows it. Use a compatible charger with correct charge algorithm to ensure full recharge and to maximize battery life.
Usage recommendations
Store and operate the battery within the temperature range specified by the system manufacturer, keep terminals clean and tightened, and perform periodic checks of charge status in standby installations to ensure reliable backup performance.

## FAQ

### How much does the Lead-acid battery FIAMM FG21803 12V 18Ah cost, and is it available for purchase?

The price is 65.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 9 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 01.07.2026 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 FIAMM 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 FIAMM 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/3520863/51097620_large.webp