Rechargeable Batteries
Li-Ion 18650 & 21700

High-performance rechargeable batteries from Fenix, Pulsar and Nitecore – protected Li-Ion cells for flashlights, night vision devices, thermal imagers and tactical optics.

Fenix Li-Ion Batteries

Protected 18650 and 21700 cells with up to 5,000 mAh for high-performance flashlights

Pulsar APS System

Swappable battery packs for thermal imagers, night vision devices and rangefinders

Nitecore Batteries

Reliable Li-Ion cells with protection circuits for demanding outdoor use

Swiss Warehouse

Fast delivery direct from our warehouse in Switzerland

At a Glance

Li-Ion batteries in standard sizes: 18650, 21700, CR123A and Pulsar APS
Fenix ARB-L18 series – protected 18650 cells from 2,600 to 3,500 mAh
Fenix ARB-L21 series – powerful 21700 cells with up to 5,000 mAh
Pulsar APS 2, APS 3 and APS 5 – swappable packs for all Pulsar optics
Nitecore NL series – robust cells for high-drain applications
Integrated protection circuits against overcharge, deep discharge and short circuit
Compatible with Fenix, Pulsar and other brand devices
Certified quality – UN38.3-certified for safe transport
Brands: Fenix, Pulsar, Nitecore
Free shipping on orders over CHF 100 in our Swiss online shop

Batteries for Flashlights, Optics and Outdoor Devices

Powerful batteries are the heart of every flashlight, night vision device and thermal imager. At Swiss-Sale.ch, you will find tested Li-Ion batteries from Fenix, Pulsar and Nitecore – reliable power sources that perform consistently even in extreme temperatures and under high discharge currents.

Our range includes around 20 battery models in the most important form factors: 18650, 21700, CR123A and the proprietary Pulsar APS battery packs. All batteries feature integrated protection circuits and are UN38.3-certified – from compact spare cells for your EDC torch to high-capacity packs for night-time observation operations.

Buying Guide – Rechargeable Batteries

18650 Batteries

The 18650 is the most widely used Li-Ion battery for flashlights. The Fenix ARB-L18 series offers capacities from 2,600 to 3,500 mAh with integrated protection circuits. For high-performance torches with heavy current draw, we recommend the high-drain variants from Nitecore with increased discharge rates.

21700 Batteries

The 21700 is the successor to the 18650 and offers significantly more capacity with a slightly larger diameter. Fenix ARB-L21 batteries deliver up to 5,000 mAh, enabling longer runtimes in modern flashlights such as the Fenix TK20R V2.0 or PD36R V2.0.

Pulsar APS Battery Packs

The Pulsar APS system (Auxiliary Power Supply) allows rapid battery swaps in thermal imagers, night vision devices and rangefinders. APS 2 (2 Ah), APS 3 (3.2 Ah) and APS 5 (4.9 Ah) each provide the right capacity for your mission duration.

CR123A & Specialty Batteries

For compact flashlights and legacy devices, we offer CR123A-compatible lithium rechargeable batteries at 3.7 V. These rechargeable cells replace expensive disposable CR123A batteries and save costs over time.

Use Cases

Our batteries power a wide range of devices: from compact EDC flashlights and powerful searchlights to headlamps, Pulsar thermal imagers, night vision devices and rangefinders. For multi-day hunting trips or night-time observation missions, we always recommend carrying at least one spare battery.

Tip: Store Li-Ion batteries at approximately 40–60 % charge in a cool, dry place. Avoid deep discharge and recharge the battery at least every 3–6 months to maximise its lifespan.

Model	Brand	Type	Capacity	Voltage
ARB-L18-2600	Fenix	18650	2,600 mAh	3.6 V
ARB-L18-3500	Fenix	18650	3,500 mAh	3.6 V
ARB-L21-5000	Fenix	21700	5,000 mAh	3.6 V
APS 3	Pulsar	APS Pack	3,200 mAh	3.7 V
NL1835HP	Nitecore	18650	3,500 mAh	3.6 V

Why Buy Batteries from Swiss-Sale.ch?

We exclusively stock tested brand batteries from Fenix, Pulsar and Nitecore. Every cell features integrated protection circuits and meets international transport regulations (UN38.3). This ensures you receive safe, long-lasting power sources for your outdoor equipment.

✓ Fenix – globally leading manufacturer of high-performance flashlights and matching accessories
✓ Pulsar – specialist in digital night vision and thermal imaging technology with a proprietary battery system
✓ Nitecore – innovative manufacturer of flashlights, batteries and chargers
✓ Free shipping on orders over CHF 100 from our Swiss warehouse

Frequently Asked Questions – Rechargeable Batteries

Which battery fits my Fenix flashlight?

Most compact Fenix models use 18650 batteries (e.g. ARB-L18-2600 or ARB-L18-3500). Newer, more powerful models such as the TK20R V2.0 or PD36R V2.0 use the larger 21700 form factor (ARB-L21-5000). You can find the exact compatibility in each product description.

What does «protected cell» mean for Li-Ion batteries?

A protected cell has an integrated protection circuit board (PCB) that safeguards the battery against overcharging, deep discharge, overcurrent and short circuits. All Fenix and Nitecore batteries in our range are protected, providing maximum safety.

Can I use Pulsar APS batteries in devices from other brands?

No, the Pulsar APS battery packs (APS 2, APS 3, APS 5) are proprietary swappable batteries designed exclusively for Pulsar devices. They fit all Pulsar thermal imagers, night vision devices and rangefinders with an APS battery compartment.

How long does a 3,500 mAh 18650 battery last in a flashlight?

Runtime depends heavily on the selected brightness level. In the lowest mode, 50 to 200 hours are often possible; in the highest mode (turbo), typically 1 to 3 hours. A 3,500 mAh battery provides roughly 35% more capacity than a 2,600 mAh model.

How do I properly dispose of defective Li-Ion batteries?

Defective or spent Li-Ion batteries must not be disposed of in household waste. In Switzerland, you can return used batteries free of charge at any point of sale or at an INOBAT collection point. Tape the terminals with adhesive tape to prevent short circuits during transport.