CR123A - CR1 - CR2 Lithium Batteries (Sensors & Photo)

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CR123A / CR2 Lithium Batteries (Sensors & Photo)

Modern smart home security systems (like Ajax) and wireless smoke detectors require reliable, long-lasting, and powerful energy that standard batteries cannot provide. VIDEX CR123A and CR2 lithium batteries are designed exactly for this purpose, offering flawless operation even in extreme temperatures. Although traditionally known as photo batteries for flashes, today they have become the standard for the smart security industry.


Why choose VIDEX CR123A and CR2:

  • Perfect for wireless alarms: Provides stable power and longevity for Ajax and other sensor brands, reducing the need for frequent replacements.
  • Temperature resistance: Works excellently in both cold outdoor conditions and hot indoor environments.
  • Massive capacity: Delivers the fast pulse current needed for high-end photo equipment, flashes, and medical devices.

Protect your home and equipment with reliable power. Order at opentools.lv!



Q: What are the main technical advantages of CR123A and CR2 lithium (3.0V) batteries in outdoor sensors and cameras?

A: CR123A (17.0 x 34.5 mm, ~1500 mAh) and CR2 (15.6 x 27.0 mm, ~800 mAh) use lithium-manganese dioxide (Li-MnO2) electrochemistry with a 3.0V voltage. These cylindrical elements provide high energy density and slow discharge across a wide temperature range from -30°C to +60°C.


Q: Why are CR123A lithium batteries specifically used in wireless security and motion sensors (such as Ajax or Eldes)?

A: Security sensors consume microamperes in standby mode, but require current peaks of up to 100 mA during an alarm or data transmission. The VIDEX CR123A battery provides low internal resistance and 1500 mAh capacity, guaranteeing 3 to 5 years of continuous security system operation.


Q: What is the difference between a single-use CR123A (3.0V) battery and a rechargeable RCR123A / 16340 (3.7V) accumulator?

A: CR123A is a single-use 3.0V lithium battery, whereas RCR123A / 16340 is a rechargeable Li-Ion accumulator with an operating voltage of 3.6V–3.7V (up to 4.2V fully charged). Inserting a 4.2V accumulator into a device intended strictly for a 3.0V battery carries a risk of burning out the sensor or flashlight microchip.


Q: Why are CR2 lithium batteries popular in compact laser rangefinders and photographic equipment?

A: CR2 offers a shortened casing (27.0 mm in length) and low weight (around 11 grams), providing an 800 mAh power reserve. This allows optical measuring device manufacturers to reduce equipment weight while maintaining a 3.0V voltage to drive camera flashes and laser diodes.


Q: How long is the storage life of CR123A and CR2 lithium batteries in unopened packaging?

A: The dry Li-MnO2 electrochemical system provides a 5-year shelf life with minimal self-discharge under 2% per year. This makes these batteries a reliable choice for backup power kits in building security systems and fire detectors.