charger specifications for MacBook A1534

See the following from Identify your Mac power adapter - Apple Support

MacBook

Apple 29W or 30W USB-C Power Adapter and USB-C Charge Cable

• MacBook models introduced in 2015 or later

That power adapter is the following currently available from the Apple Store online: 30W USB‑C Power Adapter - Apple

and the following cable: USB-C Charge Cable (2 m) - Apple

Not as long as the connectors are compatible; but you're wasting capacity. A higher rated charged will still only supply what the device demands .. if the Mac needs 35 watts, the charger will just loaf along supplying 35 watts with ease supplying less than what the charger is capable of.