1v1 hydrogen fuel shouldn't be an issue unless you're doing something very wrong.
However, if you're fully engaging against a pack you can run out of fuel. Once you start getting below 15% it is time to seriously consider using the rest of it to make an opening to jump away and have some to spare in case they follow you.
However, if you're fully engaging against a pack you can run out of fuel. Once you start getting below 15% it is time to seriously consider using the rest of it to make an opening to jump away and have some to spare in case they follow you.