I use my Bosch 18v charger from the US with a transformer. Haven't had any problems in 2 years!
Edit: the transformer I have is this one: https://www.amazon.com/Key-Power-200-Watt-Converter-International/dp/B01MSBC5LM
Check the devices you’re going to plug in. They should have an ‘Input’ rating with a voltage range. A typical input range is 120V-240V. If it supports 230V you only need a power ‘adapter’ that simply converts the prongs. If you have devices that don’t go up to 230V you need a power ‘converter’.
For example, these are what my group of four travelled Ireland with.