DELL LAPTOP INSPIRON 6400 MY LAPTOP BATTERY IS SHOWING STATUS ( UNKNOWN ) ON WINDOWS & ON BIOS IT SAYSS BATTERY NOT INSTALLED

How To Extend Your Dell Inspiron 6400 E1505 E1501 Battery's Life?

• Use the correct recharging procedure for your Dell Inspiron 6400 E1505 E1501 Battery. Only use the power cord that came with your Dell Inspiron 6400 E1505 E1501 Laptop or an authorized replacement battery.
• Flilow correct maintenance for your Dell Inspiron 6400 E1505 E1501 Laptop Battery when not in use. Don't leave it in direct sunlight, areas where it will be exposed to extreme temperatures such as car trunks.
• Use your Dell Inspiron 6400 E1505 E1501laptop's power management features. The system will run at lower processor speeds when enabling power management features and it will go into "sleep" mode faster when inactive.
• Buy dell Battery with internal processors such as Li-Ion batteries.
• Non Li-Ion batteries must be fully discharged and then recharged every 2-3 weeks.
• If you don't use your Dell Inspiron 6400 E1505 E1501 laptop for a period of time, you must fully discharge then recharge the dell Battery.

Here are my recommendations for this issue:

1. Reseat the battery.
2. Remove All External Components
3. Check the battery connectors on the battery and the system. Examine the connector on the battery and the system. Make sure that there is no physical damage and that it is clear of debris.
4. Remove All External Components
5. Try a known-good battery in the system, if available.