1. Introduction and Overview
The MJKAA AG13 1.5V Alkaline Button Cell Batteries are designed to provide stable and reliable power for a variety of small electronic devices. This 10-pack offers a convenient supply of long-lasting batteries for everyday use.
These batteries are fully compatible with several equivalent models, including LR44, A76, 357, and SR44. Their advanced alkaline chemistry ensures extended performance, particularly in devices with higher power demands, surpassing the lifespan of standard zinc-carbon alternatives. The leak-resistant construction is engineered to protect your valuable electronics from potential damage.
The packaging is designed for convenience, allowing individual batteries to be accessed while keeping the remaining batteries securely sealed, which is beneficial for safe storage and maintaining battery freshness.
2. Setup and Installation
To install the MJKAA AG13 button cell battery:
- Identify the battery compartment on your device. Refer to your device's instruction manual for specific battery replacement procedures.
- Open the battery compartment. This may require a small screwdriver for secure compartments.
- Remove any old batteries, ensuring proper disposal.
- Insert the new MJKAA AG13 battery, observing the correct polarity (+ and - markings). The positive (+) side typically faces upwards or as indicated by the device.
- Close the battery compartment securely.

Image: Proper handling and installation methods for button cell batteries.
3. Operating and Safety Guidelines
MJKAA AG13 batteries are designed for immediate use upon installation. Ensure the battery is correctly inserted and the device compartment is sealed to prevent accidental removal or exposure.
Important Safety Warnings:
- KEEP OUT OF REACH OF CHILDREN AND BABIES:
- The battery is hazardous. Swallowing can lead to chemical burns, perforation of soft tissue, and death. Severe burns can occur within 2 hours of ingestion. Seek medical attention immediately.
- Do not recharge, disassemble, heat above specified temperature, deform, or short-circuit.
- Do not dispose of used batteries with your household waste. Take them to an appropriate disposal collection site.
- Wipe off the cell with a clean, dry cloth before use.
- Be sure the cell is inserted in the right direction.
- Keep the cell in a dark, cool, and dry place.

Image: Safety warnings and proper handling instructions from the battery packaging.
4. Maintenance and Storage
Storage:
Store unused MJKAA AG13 batteries in their original, sealed packaging in a cool, dry place away from direct sunlight and extreme temperatures. This helps preserve their shelf life, which is typically up to 3 years.

Image: Graphic illustrating the long shelf life of the batteries.
Disposal:
Do not dispose of used batteries in household trash. Button cell batteries should be recycled according to local regulations. Many retail stores and recycling centers offer battery collection services.
5. Troubleshooting
If your device is not functioning correctly after installing new MJKAA AG13 batteries, consider the following:
- Check Polarity: Ensure the batteries are inserted with the correct positive (+) and negative (-) orientation as indicated in the device's battery compartment.
- Secure Connection: Verify that the batteries are making firm contact with the device's terminals.
- Device Compatibility: Confirm that your device specifically requires LR44, AG13, A76, 357, or SR44 equivalent batteries.
- Device Malfunction: If the issue persists, the problem may lie with the device itself rather than the batteries.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | MJKAA |
| Model Number | LR44 (AG13 Equivalent) |
| Battery Cell Composition | Alkaline |
| Voltage | 1.5V |
| Battery Capacity | 140 Amp Hours |
| Item Weight | 0.705 ounces |
| Product Dimensions | 6.89 x 1.97 x 0.08 inches |
| Number of Batteries | 10 (LR44 batteries required) |
| Recommended Uses | Watches, Calculators, Toys, Thermometers, Small Electronics |
| Shelf Life | Up to 3 years (when stored correctly) |
7. Product Images




8. Official Product Videos
Exact Fresh LR44 Battery, Have Full 1.5 Volts Charge
Video: A brief demonstration highlighting the fresh 1.5V charge of the LR44 batteries, ensuring optimal performance for your devices.
9. Warranty and Support
For any questions regarding the MJKAA AG13 1.5V Alkaline Button Cell Batteries, please refer to the seller's contact information on the product page or your purchase receipt. Specific warranty details may vary by retailer and region.