If you’ve ever shopped for small batteries for watches, toys, or medical devices, you’ve likely come across two names that seem almost identical — LR44 and AG13. Many people assume they’re completely different, but are they really? Let’s break down the facts, similarities, and subtle differences to help you choose the right battery for your needs.
⚙️ 1. What Are LR44 and AG13 Batteries?
Both LR44 and AG13 are button cell alkaline batteries — small, round, and designed to power compact electronic devices.
They are commonly used in:
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Watches ⌚
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Calculators 🧮
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Laser pointers 🔦
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Toys 🧸
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Medical thermometers 🌡️
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LED lights 💡
At first glance, they look identical, and that’s because they are physically and functionally interchangeable in most cases.
🧪 2. The Technical Specs — LR44 vs. AG13
| Feature | LR44 | AG13 |
|---|---|---|
| Type | Alkaline button cell | Alkaline button cell |
| Diameter | 11.6 mm | 11.6 mm |
| Height | 5.4 mm | 5.4 mm |
| Nominal Voltage | 1.5V | 1.5V |
| Chemistry | Alkaline (Zinc-Manganese Dioxide) | Alkaline (Zinc-Manganese Dioxide) |
| Capacity (mAh) | ~110–130 mAh | ~110–130 mAh |
| Common Equivalents | A76, L1154, 157 | A76, LR1154, 157 |
✅ Verdict: LR44 and AG13 are technically the same battery — just labeled differently depending on the manufacturer or region.
🏭 3. Why the Different Names?
The confusion comes from naming conventions:
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LR44 follows the IEC (International Electrotechnical Commission) standard.
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AG13 follows the ANSI (American National Standards Institute) or manufacturer code, commonly used by brands in Asia.
So, if your device manual says LR44, and your store only carries AG13, you can safely use it — they’re the same size, same voltage, and fully compatible.
🔋 4. Performance and Alternatives
Most lr44 battery and AG13 batteries are alkaline, but you’ll also find silver oxide versions (often labeled SR44, 357, or SR1154).
Here’s how they compare:
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Alkaline (LR44/AG13): Cheaper, slightly shorter lifespan, gradual voltage drop.
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Silver Oxide (SR44/357): More expensive, longer-lasting, stable voltage output — ideal for watches or precision electronics.
💡 Tip: If your device is sensitive to power fluctuations (like cameras or medical tools), silver oxide batteries are worth the extra cost.
♻️ 5. Safety and Disposal
Even though they’re tiny, button batteries can be dangerous if swallowed — especially for children or pets.
Always:
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Store them in a secure place.
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Recycle used batteries properly (most electronics stores accept them).
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Avoid mixing old and new batteries in the same device.
💰 6. Which Is Better: LR44 or AG13?
Since they’re essentially identical, “better” comes down to brand quality, not the label.
Trusted brands like Duracell, Energizer, Panasonic, and Maxell deliver consistent voltage and longer shelf life. So whether you buy an LR44 or AG13, focus on brand reliability and freshness (manufacture date) for best results.
🧭 Final Verdict
In the LR44 vs. AG13 debate, the truth is simple —
They’re the same battery, just with different names.
Use them interchangeably with confidence. For better longevity, consider the silver oxide (SR44) alternative. Whether it’s your watch, toy, or laser pointer, both LR44 and AG13 will power your small devices efficiently.
