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Views: 0 Author: Site Editor Publish Time: 2026-01-28 Origin: Site
Button batteries, those small, shiny discs, power countless devices in our daily lives. But with various types and numbers, they can be confusing. Let's break it down in a minute.
The prefix letters on a battery indicate its chemical composition, which determines its voltage and typical use.
Lithium (CR Series): The most common type today (e.g., CR2032). They provide a stable 3V output, have a long shelf life (low self-discharge), and perform well in a wide temperature range. Ideal for motherboards, car keys, and premium watches.
Alkaline (LR Series): Such as LR44. Voltage is 1.5V. They are more affordable but have a shorter lifespan and can leak if depleted. Commonly found in toys, calculators, and some older devices.
Silver Oxide (SR Series): Such as SR626SW. Voltage is 1.55V. They offer very stable voltage and high capacity for their size, making them perfect for precision devices like watches, hearing aids, and medical instruments.
Zinc-Air (PR Series): Primarily used for hearing aids (e.g., PR41). They are activated by removing a sticker to let air in, providing high capacity. Voltage is 1.4V.
Quick Tip: You cannot directly replace a 3V lithium battery with a 1.5V alkaline battery. Always check your device's required voltage.
The code is not random. Let's use CR2032 as an example:
C = Chemical composition (Lithium).
R = Shape (Round).
20 = Diameter in millimeters (20mm).
32 = Height in tenths of a millimeter (3.2mm).
So, a LR44 battery is a round (R), alkaline (L) battery, about 11.6mm in diameter and 5.4mm high. Common models include CR2025 (thinner), CR2016 (even thinner), and the popular watch battery SR626SW (also known as 377).
Proper handling is crucial for performance and SAFETY.
Installation: Identify the + (positive) and - (negative) sides. The smaller, flat side with writing is usually positive (+). The larger, smooth metal side is negative (-). Your device's compartment will have corresponding markings.
Handling: Use clean, dry hands. Avoid touching both sides simultaneously with metal objects to prevent short circuits.
Storage: Keep new batteries in their original packaging, away from high temperatures, humidity, and metal objects like coins and keys.
Replacement: Replace all batteries in a device at the same time. Do not mix old and new batteries or different types.
Keep Away from Children! Button batteries pose a severe choking and poisoning hazard. If swallowed, they can cause catastrophic internal burns in as little as two hours. Seek immediate emergency medical attention.
Disposal: Do not throw in regular trash. They contain heavy metals. Dispose of used batteries at designated recycling points or electronic waste collection stations.
In a Nutshell: Check your device's manual for the required model and voltage. Choose Lithium (CR) for long-life electronics, Silver Oxide (SR) for precision watches, and Alkaline (LR) for low-drain items. Always prioritize safe handling, secure storage, and proper disposal.
