I have a Dell Latitude E5450. On the original power supply it says output: 19.5V - 3.34A
Can I use a battery pack that provides 19V - 3A?
Hopefully somebody can explain this to me and what I need to be careful for. Is it OK to be below the numbers? Is it OK to be over? What is the range?
In relation to the voltage, you need to match the existing battery, like for like. In relation to the current (amps), then as long as the battery matches or exceeds the existing battery's rated current it will be OK.
As the power supply charges the battery through a regulation circuit, there is no direct relation between charger voltage and battery voltage.
