What's a good battery then?

[Fluffycloudland77]

Dh says his battery doesn't seem to be burning & yet tastes of burnt stuff?.

Any ideas on a good battery for a man who is never away from his vape?

Is the coil the cotton bit? If it is then yes it's been changed.

The tank was bought off a friend so we don't know where it came from.

A high wattage and variable wattage mod I guess.