- AG (Alkaline Button Batteries)
- Also known as LR (alkaline chemistry) in some contexts.
- Common sizes include AG1/LR621, AG3/LR41, AG4/LR626, etc.
- Generally used in low-drain devices like watches, toys, and calculators.
- LR (Alkaline Batteries)
- Indicates a battery using alkaline chemistry.
- Used interchangeably with AG in some small batteries.
- Offers a good balance between cost and capacity, suitable for both low and medium drain devices.
- SR (Silver Oxide Batteries)
- Superior to alkaline batteries in terms of stability and capacity.
- Common codes include SR621SW (364), SR626SW (377), SR920SW (371), etc.
- Typically used in watches where a stable voltage and long life are needed.
- CR (Lithium Coin Batteries)
- Indicates lithium chemistry, offering high energy and long shelf life.
- Common examples are CR2032, CR2025, CR2016, etc.
- Used in a variety of devices from car keys and remote controls to digital watches and medical devices.
- BR (Lithium Poly-Carbon Monofluoride Batteries)
- Similar to CR but optimized for devices requiring stable, long-term power at a lower voltage.
- Common sizes like BR2032 provide slightly lower voltage with improved temperature tolerance.
- Often used in memory backup applications.
Comprehensive Battery Guide for Watches and Car Keys:
- Watches:
- Silver Oxide (SR): SR621SW, SR626SW, SR920SW, SR927SW – Best for watches due to voltage stability and longevity.
- Lithium Coin (CR): CR2032, CR2016 – Used in digital watches and as backup power in quartz watches.
- Car Keys:
- Lithium Coin (CR): CR2025, CR2032, CR2450 – Common in modern car key fobs for their high energy density and durability.
Buying Tips:
- Check Compatibility: Always check the device’s manual for recommended battery type and size.
- Opt for Brand Names: Higher quality batteries from well-known brands tend to last longer and offer more reliable performance.
- Consider Usage: Choose battery chemistry based on device requirements; e.g., silver oxide for watches requiring stable output, lithium for high-energy applications like car keys.
This guide should help you navigate the complex world of batteries, ensuring that you purchase the right type for your needs, thereby maximizing both performance and lifespan of your devices.
