A laptop with no charger is like a chair with no legs. This laptop charger from Lenovo is designed with an output of 45 W, so it'll easily take care of recharging your laptop. The original AC charger is for use with Lenovo laptops.
Lenovo ThinkPad 45W AC USB-C Charger Key Features
Original charging cable by Lenovo may be used with Lenovo ThinkPad computers
The charger is suitable for connection to a standard electrical network
Power output of 45 W
Package contains power cord leading from the adapter to the mains