cell from A123 Systems for radio control hobby use. Also used in larger, high-powered LED flashlights and some electronic cigarettes. This size is sometimes used in devices that can take either one 26650 or three AAA cells in series in a cylindrical 3-cell battery carrier. E-Bike Report From Eurobike: New Tech & New Batteries". Electric Bike Report. 10 September 2015. Archived from the original on 20 August 2016 . Retrieved 31 August 2016.

Used in older instruments. [245] Many of these were sold as Bbatteries for early transistor radios (before their function was replaced by the 9-volt PP3 battery). Used in keychain LED flashlights, and in some digital cameras to keep the time and date function running even when the main battery is taken out of the camera. [147] [148]This battery typically had two snap connectors; however, four [ clarification needed] connector versions are available. They were spaced 35mm ( 1 + 3⁄ 8in) apart. This type of battery is sometimes used in electric fencing applications.

If we go into detail, batteries convert chemical energy directly to electrical energy. For example, chemical energy can be stored in Zn or Li, which are high-energy metals because they are not stabilized by d-electron bonding, unlike transition metals. Primary lithium batteries have the lowest self-discharge rate hence the longest available shelf time, up to 10 years, and in temperatures up to 70. The first letter in the IEC standard system identifies the battery’s chemical composition. C is for lithium metal batteries (as CR2032). The characteristics that make lithium an exceptional electrode material for high energy density batteries include low electrode potential and very high conductivity. It is soft and malleable and can be extruded into thin foils. A CR2 battery is a 3V lithium-metal-based cylindrical cell that can be used to power devices such as alarm system motion detectors, flashlights, cameras, monitors, computer memory, toys, games, LED lights, and much more. They’re usually button top, and are primary (non-rechargeable) batteries.Energizer L544" (PDF). Data.energizer.com. Archived (PDF) from the original on 26 November 2018 . Retrieved 15 February 2017. What kind of batteries do the SteriPEN products use? | Portable UV Purifier". Portable UV Purifier. Archived from the original on 15 August 2018 . Retrieved 4 January 2018.

Vapcell 16340 800mAh 7A Button Top Battery". lygte-info.dk. hkj. May 2019 . Retrieved 24 September 2019. FLYCO Ni-Cd, Ni-Mh, 600–1,500 capacity, 14.0 × 40.0, used in small electronics, such as electric shavers. Direct replacements and equivalents for the CR2 battery could be, DLCR2, KCR2, ECR2 1CR2, and 5046LC. These batteries are all direct replacements for the CR2 battery, and are all considered primary or non-rechargeable batteries. Rechargeable or secondary versions of the CR2 battery are the 15270 battery and the 15266 battery. These rechargeable versions of the CR2 battery tend to have a slightly lower capacity (lower mAh) than the non-rechargeable versions, but will still fit in and power the same devices. You will see a longer single-use life with the non-rechargeable version, but will save money in the long run using the rechargeable CR2 battery. Are CR2 Batteries The Same As CR123A?

LED Torches & Flashlights

Lithium-ion rechargeable batteries are generally not interchangeable with primary types using a different chemistry, due to their higher voltage. Many are also available with protection circuits that can increase their physical length; for example, an 18650 is around 65mm (2.56in) long, but may be around 68mm (2.68in) long with a protection circuit. Some such circuits increase cell diameter instead. The increased dimensions may mean the cell will no longer fit in battery compartments intended for cells without such circuitry.