You were given a charger with your chromebook. If the charger is missing or damaged, you will need to purchase a replacement charger.

If you have a Lenovo 300e Chromebook 2nd Gen, you need to purchase a 45 watt USB-C 45 power adapter cord from any vendor.

If you have a Lenovo 300e Yoga Chromebook Gen 4, you need to purchase a 65 watt USB-C power adapter cord from any vendor.