Is "of course" a proper answer in this situation? (the other party is sort of like a manager)

Yes

"Of course" sounds great, but "henceforth" is too formal. I would say "from now on."

It's fairly common, yes. Its intention is to convey that helping you is only natural.

"Of course" is less weird/formal than "you're welcome" but more professional (to me) than "no problem" or don't mention it.

Looks good! However, "henceforth" is too formal, so it reads as slightly sarcastic to me. If you're clearly a non-native speaker then I doubt they took it that way though!

I always answer with an "Anytime" but im not sure if it's correct.

Yep, "of course" is a normal response to "thank you". It's a casual "you're welcome".

This feels a bit odd as an Australian, but I have seen it regularly used by Americans. Its supposed to be suggesting that "of course I'd do this for you" but like, I find the link tenuous personally? In australian english, I think this would generally be considered odd by others and there are many identical but less perplexing choices like "No worries", "No problem" etc.

Hi guys.What does this sentence mean?" It is far too big a problem for you to solve it."particularly it is far

I have no issues with anything you said. I would be appreciative if I were your manager and you spoke to me this way.

A small side note on this: in the first text, it should be “we don’t want the battery to *burn* out.” Not “burnt”.

Yes 😁

I've never heard "of course" as a response to thank you. Thank you. That's OK No problem(o) No worries (Australian) No wuckers (Even more Australian) You're welcome (formal)

I’ve never seen this (in the UK) as a response to thank you. Typically, I’d go for “you’re welcome” (more formal) or “no problem” (more causal).

Yes. "Of course (you are welcome)" or "Of course (I'm happy to help)". In my opinion, "Of course" is much friendlier than "You're welcome". It is similar to "I am guaranteed to help you". There's no situation where the person would not assist you.

Yes, that sounds right to me. I also like “happy to help.”

This whole interaction comes across like how little kids chat on Roblox.

You know how to use henceforth and aren’t sure about of course?!

It's a common and grammatically correct statement. This is just me, but I don't care for it. When people say of course to me it feels like they are diminishing my thanking them. But as I say, it's probably just me that feels that way.

Maybe not the first choice unless you're being formal or subserviant (possibly applicable if it's a manager but depends on the relationship). "You're welcome" or "No problem" are more common, but it's perfectly fine to use. As someone else mentioned though, your second text comes across as a bit stilted. "Mindful" and "henceforth" stick out in particular. Neither are wrong, but they're not really used in common speech either ("henceforth" especially). It's the kind of text I'd use in an official document or when being deliberatly pretentious. A more natural way of phrasing it might be something like "I'll be more careful to keep you informed about the charging from now on."

Yes or “ofc” works as well as an abbreviation.

I wonder if this is an American-english thing? In my country —we speak British-english, I hardly hear or see 'of course' used in this context, and I personally cringe at the sight of it. Similarly to when people say "Sure" when thanked.

If you’re friendly with them and they’re nice then yea you could say “of course” but if not then I’d just stick to “no problem”