# Battery and Charger Fieldmann FDUZ 79040 — Li‑Ion 4000 mAh

**URL:** https://aio.lv/en/product--fieldmann-50004544--8122114
**Data updated:** 2026-03-07 15:17 (EET)
**Category:** Power tool batteries
**Manufacturer:** Fieldmann
**Manufacturer code:** 50004544
**EAN:** 8590669303830
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 56.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 47.10 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fieldmann-50004544--8122114

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.06.2026 | free |
| Pickup points | 02.07.2026 | 1.99 EUR |
| Courier delivery to door | 02.07.2026 | 4.99 EUR |

## Summary description

Fieldmann FDUZ 79040 is a cordless tool battery with an integrated charger solution using Lithium‑Ion (Li‑Ion) technology and a rated capacity of 4000 mAh. Designed for use with compatible cordless tools, it provides portable power for garden and DIY equipment. Key features include Li‑Ion chemistry for stable output, 4000 mAh capacity for extended runtime, and suitability for replacement or spare power needs.

## Long description

Fieldmann FDUZ 79040 — Li‑Ion 4000 mAh is a cordless tool battery with an integrated charger solution that provides portable power for compatible FAST POWER 20V series devices. Using Lithium‑Ion technology and a rated capacity of 4000 mAh, this battery is intended as a replacement or spare power source for garden and DIY equipment. The cell chemistry offers stable output across the discharge cycle, a minimal difference in performance between full and near‑empty charge, low self‑discharge and protection features that reduce the risk of overload, overheating and deep discharge.
Advantages
The Li‑Ion chemistry ensures consistent voltage and balanced performance during long work periods while remaining lightweight compared with older battery types. The 4000 mAh capacity extends runtime for tasks such as mowing, trimming or portable drilling. The battery is compatible with all machines from the FAST POWER 20V battery series and can be charged at any state of discharge without memory effect. Built‑in protections help preserve cell life and reduce the chance of damage from overcurrent, excessive temperature or deep discharge, and minimal self‑discharge keeps the battery ready after storage.
Suitable for
 Garden tools: cordless lawn mowers, trimmers and leaf blowers of the FAST POWER 20V series
 DIY and workshop tools: drills, drivers and screwdrivers compatible with FAST POWER 20V
 Replacement battery for prolonged outdoor tasks or as a spare pack for multi‑battery workflows
Key specifications
 Battery type: Lithium‑Ion (Li‑Ion)
 Nominal voltage: 20 V (FAST POWER 20V series compatibility)
 Rated capacity: 4000 mAh
 Integrated charger solution for convenient charging
 Protection features: overload, overheating and deep discharge protection
 Low self‑discharge for extended storage readiness
 Compact, lightweight construction for portable use
How to use
Insert the Fieldmann FDUZ 79040 battery into a compatible FAST POWER 20V device until it clicks into place and follow the tool manufacturer’s instructions for operation. If the battery includes an integrated charger interface, connect it to the specified power source and charge according to the indicator or charger instructions. The battery can be charged at any time regardless of charge level; avoid exposing the battery to extreme temperatures during charging or storage. After use, remove the battery from the device if prolonged storage is intended and store it in a cool, dry place.
Usage recommendations
To extend service life, avoid deep discharges whenever practical, keep the battery and device contacts clean, and use only compatible chargers and tools from the FAST POWER 20V series. Do not expose the battery to fire, strong impact, or prolonged high temperatures. If the battery becomes hot, emits unusual smell or shows visible damage, discontinue use and follow local recycling or disposal regulations for lithium batteries.

## Specifications

| Feature | Value |
|---|---|
| Battery technology | Lithium-Ion (Li-Ion) |
| Product colour | Black, Green |
| Proper use | Drill, Power multi-tool, Power screwdriver, Rotary hammer, Sander |
| Battery voltage | 20 V |
| Battery LED indicator | Yes |
| Power protection features | Overheating, Overload |
| Brand compatibility | Fieldmann |
| Battery capacity | 4000 Ah |
| Product type | Battery |

## FAQ

### How much does the Battery/Charger Fieldmann FDUZ 79040 cost, and is it available for purchase?

The price is 56.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 29.06.2026 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 Fieldmann 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 Fieldmann 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

### Where can I download the instructions for Battery/Charger Fieldmann FDUZ 79040?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/8122114/64843287_large.webp