6135-12-194-3651 CR2032 Lithium Coin Battery

A CR2032 battery is a 3V lithium manganese dioxide coin-shaped cell commonly used to power small, low-drain electronic devices.

Key Product Features

• Reliable 3V Power: Delivers a stable 3V output with a typical capacity of approximately 210–240 mAh.
• Extended Shelf Life: High-quality cells maintain power for up to 10 years in proper storage, with a low self-discharge rate of about 1% per year.
• Wide Temperature Range: Operates effectively in extreme environments, typically ranging from -30°C to +60°C (-22°F to 140°F).
• Leak-Proof Construction: Innovative sealing technology prevents leakage to protect your expensive electronics.
• Safety Features: Often available in child-resistant packaging to prevent accidental ingestion.

Common Applications

This versatile battery is a direct replacement for many household devices, including:

• Security & Entry: Car key fobs, garage door openers, and AirTags.
• Medical Devices: Blood glucose meters, digital thermometers, and oximeters.
• Computing: PC motherboard CMOS/BIOS batteries and calculators.
• Electronics: Watches, LED lights, small toys, and remote controls.

In the military and tactical sectors, the CR2032 battery is a critical power source primarily for small electronic accessories, optical sighting systems, and portable lighting. 

Primary Military End-Items (Germany)

This specific NSN (6135-12-194-3651) is the standard replacement part for many systems manufactured by major German defense firms like Rheinmetall, Hensoldt, and Heckler & Koch.

Specifically, you will find it in:

• Hensoldt (formerly Zeiss) Optics: Used in the memory and brightness control modules of the ZO 4x30 combat sights and various thermal imaging attachments (like the NSV 80) used by the Bundeswehr.

• Small Arms Accessories: Powers the electronics in the G36 and HK416 optical suites (red dot sights and laser modules).

• Leopard 2 Tank Peripherals: Used on certain internal computer cards within the fire control system for CMOS battery backup.

• Encryption Devices: Found in German-made secure communication hardware to maintain cryptographic keys in the absence of main power.

Optical & Sighting Systems

The most widespread military use of CR2032 batteries is in reflex and red dot sights used by armed professionals for rapid target acquisition. 

• Aimpoint Sights: Several professional-grade optics utilize CR2032s, including the ACRO P-2 reflex sight and the Micro T-2. The Aimpoint PRO (Patrol Rifle Optic) also relies on this battery to provide up to 30,000 hours of illumination.
• Trijicon Optics: The Trijicon SRO (Specialized Reflex Optic) and certain RMR Type 2 reflex sights are powered by a single CR2032.
• Sig Sauer Electro-Optics: The ROMEO5 Gen II and ROMEO4T-PRO series use CR2032 batteries to power their reticles, often featuring night vision-compatible brightness settings.
• Holosun Collimators: Many Holosun red dot sights, frequently used in tactical configurations, are designed specifically for this battery type. 

Night Vision & Helmet Accessories

While many primary night vision units use larger batteries (like AA or CR123A), the CR2032 powers several critical peripheral components. 

• Helmet Mounts & Accessories: Specialized mounts and switches for Night Vision Goggles (NVGs) use these coin cells for low-profile power.
• Illumination Controls: Some optics featuring "Night Vision" (NV) settings use the CR2032 to maintain ultra-low reticle brightness levels for use with goggles. 

Tactical Lighting & Communication

• LazerBrite Tactical Lighting System: This modular LED system uses CR2032 batteries to provide visible or infrared (IR) light for signaling and marking in the field.
• Tracking & Asset Management: Ruggedized tracking tags (similar to civilian AirTags but often integrated into military gear management) utilize CR2032s for long-term location monitoring.
• Backup Electronics: Digital lasers, small tactical lights, and backup digital sights often use these cells due to their 10-year shelf life and reliability in extreme temperatures.