Using lower wattage power supply on laptop e6430. What if you remove the battery? I think can use it

Not recommended.
After removing the battery on a dell e6430.. the electric needed to run this dell laptop was reduced (since it didn't need to charge the battery)
This laptop requires a 90w power supply adapter.
When I remove the battery.... since it no longer needs to charge anymore... the power requirements on the laptop get greatly reduced.
Instead of needing up to 90w of electricity to charge and power the laptop.... without the charging aspect.. it only needs as much electricity to run the laptop. In this case.. it ran around 20+ watts