1400mAh NH-14WM Replacement Battery for Sony Walkman Cassette Player WM-EX921
- onebattery
- 1 hour ago
- 2 min read
The 1400mAh Sony NH-14WM MP3 Audio Player Battery is specially designed as a high-quality replacement battery for Sony Walkman Cassette Player WM-EX921. With stable performance, long-lasting power capacity, and excellent compatibility, this Sony NH-14WM battery helps restore your equipment’s mobility and extends its daily working time. It is an ideal choice for users who need to replace an aging or damaged battery while keeping their Sony Walkman Cassette Player WM-EX921 running efficiently.
1400mAh NH-14WM Replacement Battery for Sony Walkman Cassette Player WM-EX921

Product Specifications
Brand: MP3 Audio Player Battery for Sony
Battery Type: Ni-MH
Battery Voltage: 1.2V
Battery Capacity: 1400mAh
Warranty: 30 Days Money Back, 1 Year Warranty.
Over 500-800 times of charge and discharge.
Compatible Part Numbers:
Compatible Models:
for Sony Walkman Cassette Player WM-EX921
for Sony Walkman Cassette Player WM-609
for Sony NE20
for Sony 730
for Sony EJ2000
for Sony 1000
for Sony EX921
for Sony R909
for Sony 900
for Sony NC-5WM
for Sony NC-6WM
for Sony NH-9WM
for Sony NH-10WM
for Sony D-E888 Walkman
for Sony MD/CD Walkman MiniDisc Gumstick
Important Usage Tips and Safety Precautions
For safe and effective operation of the 1400mAh Sony NH-14WM MP3 Audio Player Battery for Sony Walkman Cassette Player WM-EX921, please consider the following precautions:
Do not expose the battery to water, moisture, or extreme heat.
Do not disassemble, modify, or damage the battery, as this may cause safety risks.
Avoid using damaged charging cables or incompatible adapters.
If the Sony NH-14WM battery becomes swollen, overheated, or shows unusual performance, stop using it immediately and seek professional assistance.
Allow the Sony NH-14WM battery to complete several normal charge and discharge cycles after installation to help achieve optimal performance. A Reliable Power Solution for Your Sony Walkman Cassette Player WM-EX921.
How to Properly Maintain Your Sony NH-14WM MP3 Audio Player Battery
To maximize the lifespan and performance of your Sony NH-14WM MP3 Audio Player Battery, following proper maintenance habits is important:
Avoid frequent full discharge: Try to recharge the battery before it completely runs out of power. Keeping the Sony NH-14WM battery level between approximately 20% and 80% can help reduce battery stress.
Use the correct charger: Always use a compatible charger with the correct voltage and specifications to ensure safe and efficient charging.
Keep the battery temperature controlled: Excessive heat can affect Sony NH-14WM battery performance and lifespan. Avoid using your equipment on soft surfaces that block ventilation, and keep the device away from high-temperature environments.
Charge regularly during storage: If you do not use your equipment for an extended period, charge the battery to around 40%-60% and store it in a cool, dry place.
Maintain clean connections: Keep the Sony NH-14WM battery contacts and equipment interior free from dust to ensure stable power transmission.
A Reliable Power Solution for Your Sony Walkman Cassette Player WM-EX921
The 1400mAh Sony NH-14WM MP3 Audio Player Battery for Sony Walkman Cassette Player WM-EX921 combines dependable power, convenient installation, and long-term usability. With proper care and responsible usage, this replacement battery can help extend your laptop’s service life and provide a more stable mobile computing experience.
Choose a quality replacement battery for Sony NH-14WM to bring your Sony Walkman Cassette Player WM-EX921 back to its full potential and enjoy reliable performance wherever you go.



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