How to Identify the Right Button Cell Battery (LR44 vs CR2032 vs 377 – What’s the Difference?)

🔋 How to Identify the Right Button Cell Battery (LR44 vs CR2032 vs 377 – What’s the Difference?)

Button cell batteries may all look similar, but not all are interchangeable.

Using the wrong battery can lead to:

• 🔇 Device malfunction
  
  

• 🔋 Shorter battery life
  
  

• ⚠️ Risk of damage or leakage
  
  

If you're confused between LR44, CR2032, and 377, this guide explains:

• What each model means
  
  

• Where they are commonly used
  
  

• How to avoid costly mismatches
  
  

• Where to buy authentic ones online in India
  
  

Let’s break it down.

📦 Quick Comparison Table: LR44 vs CR2032 vs 377

🛒 Buy All Button Cell Types →

🔍 Understanding Each Battery Type

🔹 LR44 Battery – The Toy & Thermometer Powerhouse

• Voltage: 1.5V
  
  

• Chemistry: Alkaline
  
  

• Size: 11.6 mm x 5.4 mm
  
  

• Also Known As: AG13, A76, L1154
  
  

Common Uses:

• Digital thermometers
  
  

• Laser pointers
  
  

• LED toys
  
  

• Small electronics
  
  

• Hearing aid remotes
  
  

🛒 Buy LR44 Batteries →

🔹 CR2032 Battery – The Coin Cell King

• Voltage: 3V
  
  

• Chemistry: Lithium
  
  

• Size: 20 mm x 3.2 mm
  
  

• Also Known As: DL2032, BR2032
  
  

Common Uses:

• Car key remotes
  
  

• Fitness bands (Mi Band, etc.)
  
  

• Glucometers
  
  

• Motherboards (CMOS)
  
  

• Smart doorbells
  
  

🛒 Buy CR2032 Batteries →

🔹 377 / SR626SW – The Watch Specialist

• Voltage: 1.55V
  
  

• Chemistry: Silver Oxide
  
  

• Size: 6.8 mm x 2.6 mm
  
  

• Also Known As: SR66, AG4, LR626
  
  

Common Uses:

• Analog wristwatches
  
  

• Pocket calculators
  
  

• Medical devices
  
  

• Small digital meters
  
  

🛒 Buy 377 Batteries →

🧠 Pro Tip: Why Voltage & Chemistry Matter

You should never substitute batteries purely by size.

Why?

• CR2032 (3V) can overload a device made for LR44 (1.5V)
  
  

• Silver oxide (377) offers more stable voltage than alkaline (LR626) — better for sensitive electronics
  
  

📌 Always check the device manual or existing battery code before buying replacements.

🛑 Avoid These Common Mistakes

1. Using LR44 instead of CR2032 — different voltage, shape, and chemistry
   
   

2. Assuming all “coin” batteries are the same — CR2032 ≠ CR2025 ≠ CR2016
   
   

3. Buying loose cells from local vendors — may be near expiry or counterfeit
   
   

4. Storing with other metals — risk of short-circuiting
   
   

🛒 Where to Buy Genuine Button Cell Batteries in India?

🎧 MyBattery.in is India’s most trusted battery store, offering:

• ✅ 100% original products from Sony, Maxell, Panasonic, Duracell
  
  

• ✅ Sealed packs with long expiry
  
  

• ✅ Same-day or 2-day delivery in major cities across Maharashtra, Karnataka, Delhi, Tamil Nadu, and more
  
  

• ✅ Bulk order options for clinics, watch stores & schools
  
  

🛍️ Explore All Button Cell Models →

💡 Expert Tips for Battery Care & Usage

• ✅ Store in cool, dry places
  
  

• ✅ Don’t remove tabs until ready to use
  
  

• ✅ Don’t mix old and new batteries in a device
  
  

• ✅ Mark your expiry dates if buying in bulk
  
  

🏷️ Best Sellers

❓ FAQ – Button Cell Battery Differences

Q1. Can I use CR2032 in place of LR44?
No. CR2032 is a lithium coin cell with 3V, while LR44 is a 1.5V button battery — they’re not compatible.

Q2. What's the best battery for digital thermometers?
LR44 is the most commonly used battery for thermometers in India.

Q3. Is 377 the same as SR626?
Yes. 377 is the generic name, while SR626SW is the IEC (technical) name.

Q4. How long do button cell batteries last?
Shelf life is typically 3–5 years. In-use life varies based on device and brand.

Q5. Are all button cells rechargeable?
No. Most standard button cells (LR44, CR2032, 377) are disposable.

📣 Final Thoughts – Choose Smart, Power Smart

Knowing the exact battery code and chemistry ensures longer device life and user safety.

Whether you're powering a watch, remote, thermometer, or fitness band, MyBattery.in delivers the right battery, fast and fresh — anywhere in India.

🎯 👉 Order Now at MyBattery.in
Your one-stop shop for all battery types — with expert support & fast delivery.