M5Y0X Laptop Battery Replacement For DELL Latitude E6420 E6520 E5420 E5520 E6430 71R31 NHXVW T54FJ 9CELL 11.1V 97WH | KingSener

Condition: Replacement Battery (100% Brand New,1-year warranty!)

Note:

This is not a complete list or inclusion of all compatible laptop models. You can open the back of your laptop to check the original battery model. If you have any compatibility questions, please contact us online.

Our battery products are manufactured using high-quality materials and advanced technology to ensure stability and reliability.
The casing is made of durable materials, the mainboard adopts advanced technology, and the battery core is produced with high-quality raw materials to ensure that it will not be damaged after long-term use.
Our products are equipped with multiple protection technologies such as overvoltage, overcurrent, and overcharge to effectively protect the safety of batteries and equipment.

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Quick FAQ:Laptop Battery Care & Troubleshooting

• How long does a KingSener battery last?
  2 to 3 years (approx. 500-800 charge cycles) under normal temperatures.
• Laptop says "Battery Not Detected". How to fix?
  1. Hard Reset: Unplug AC, remove battery, hold power button for 30 seconds.
  2. Clean Contacts: Wipe metal connection pins.
  3. Reset Drivers: Uninstall battery drivers in Device Manager, then restart.
  4. Update BIOS: Ensure motherboard firmware is up to date.
• Can I leave my laptop plugged in 24/7?
  Yes, the built-in TI chip prevents overcharging. Tip: To prevent long-term cell swelling, unplug and drain the battery to 40% twice a month.
• How do I store a laptop battery long-term?
  Store it at 50% charge in a cool, dry place. Never store at 0% or 100%. Cycle the battery every 3 months to maintain chemical activity.
• Are KingSener batteries safe?
  Yes. All batteries feature built-in IC protection against short-circuits, over-voltage, and overheating. Fully CE, FCC, and RoHS certified.