# Rechargeable 18650 Li‑Ion battery Fenix ARB-L18-3500U 3500 mAh

**URL:** https://aio.lv/en/product--fenix-909662--11431933
**Data updated:** 2026-04-08 14:21 (EEST)
**Category:** Batteries
**Manufacturer:** Fenix
**Manufacturer code:** 909662
**EAN:** 6942870304724
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 21.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 17.76 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fenix-909662--11431933

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Fenix ARB-L18-3500U is a rechargeable 18650 lithium‑ion battery with 3500 mAh capacity. Designed for devices that accept 18650 cells, it offers long runtime for flashlights, headlamps and other portable electronics. The cell’s rechargeable chemistry provides repeated use and reliable power delivery for everyday and professional applications.

## Long description

Fenix ARB-L18-3500U is a rechargeable 18650 lithium‑ion battery with a nominal capacity of 3500 mAh. Designed for devices that accept standard 18650 cells, this battery provides extended runtime and stable voltage suitable for demanding portable equipment such as flashlights, headlamps and other handheld electronics. The cell follows common lithium‑ion charging and discharge characteristics and is intended for repeated recharge cycles.
Advantages
The battery delivers high energy density in the 18650 form factor, offering long runtime compared with lower‑capacity cells. Its rechargeable lithium‑ion chemistry supports multiple charge/discharge cycles while maintaining consistent output voltage under typical loads. The cell fits most devices designed for 18650 batteries and enables straightforward replacement or capacity upgrade. Built with standard safety features of consumer li‑ion cells, it is compatible with widely available chargers that support 18650 chemistry and voltage.
Suitable for
Flashlights and tactical lights that accept 18650 cells
Headlamps and worn lighting for outdoor activities
Portable power banks and DIY battery packs using 18650 cells
Handheld electronic tools and devices with 18650 compatibility
Key specifications
Cell type: Rechargeable lithium‑ion (18650 form factor)
Nominal capacity: 3500 mAh
Typical voltage: 3.6–3.7 V nominal
Form factor: 18 mm diameter × 65 mm length (standard 18650 size)
Rechargeable: Yes — designed for repeated charge/discharge cycles
Intended use: High‑capacity power source for consumer and professional portable devices
How to use
Insert the battery into any compatible device following the device’s polarity markings. Use a charger designed for 18650 lithium‑ion cells and observe the charger manufacturer’s instructions for charging current and termination method. Do not attempt to force the cell into devices that do not accept 18650 dimensions. Allow the battery to cool if it becomes warm during use or charging and avoid deep discharge below the device’s recommended cutoff voltage to prolong cycle life.
Usage recommendations
Store and transport the battery in a cool, dry place and avoid exposure to extreme temperatures. Charge the cell with a charger that supports lithium‑ion chemistry and recommended charge rates. Inspect cells regularly for damage and discontinue use if the cell shows swelling, leakage, or other signs of failure. Follow local regulations for disposal or recycling of lithium‑ion batteries.

## Specifications

### Battery

| Feature | Value |
|---|---|
| Battery type | Akumulators |
| Battery size(s) | 18650 |
| Battery technology | Lithium-Ion (Li-Ion) |
| Number of batteries included | 1 pc(s) |
| Battery capacity | 3500 mAh |

### Weight & dimensions

| Feature | Value |
|---|---|
| Depth | 0.5 mm |

## FAQ

### How much does the Fenix ARB-L18-3500U 18650 Rechargeable Li‑Ion 3500 mAh cost, and is it available for purchase?

The price is 21.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 02.07.2026 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 Fenix 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 Fenix 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: battery type, battery technology, number of batteries included, battery size(s), 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/11431933/68168118_large.webp