Recently got my new M2 air. On Sunday i used it and closed it without shutting it down, then i forgot about it for 4 days until today (Thursday). I opened it and expected the apple logo, but it went straight to the Lock Screen indicating it’d been on all that time. It was on 43%. I shut it down today, but will this mean my MacBooks battery will be impacted/ does it cause any damage to the device. Really worried as it was expensive and i want to keep it in perfect shape.
No. This is perfectly fine. It is designed in a way that allows it to be used this way. Any possible effect this has on the battery (in the long term*) is not measurable by current technology.