I will second the Milwaukee M18, they come in a range of powers depending on what you are intending to use it for.
The kit including a battery and charger is often on a special on SGS if you are patient.
I have the biggest one and it has yet to fail but as has been said the battery needs to be fully charged on some of the tougher jobs.
Like this
https://www.sgs-engineering.com/milw...arger-and-case