Not sure the mah, Volcano doesn't say, all they put on their website is "last an hour longer that regular battery" and they say the standard battery lasts an hour???? Often wonder if it would be more useful if batteries were rated in how many mL of juice they could vaporize on each charge......LOL
Heavy vaping for me is going thru 2mL - 26mg juice driving to work when the traffic is worse than usual....used to be near a 1/2 pack of camel filters.
Well the magma is a rebranded 510 so I'm guessing the mega is a rebranded XL. I believe madvapes lists those at 250mah. I know mine last 2-3 hrs depending on how heavy I go at it and when I replace them I'm getting them from madvapes because they are cheaper.
Volcano isn't what I'd call a scam vendor but I'm not really happy they rebranded their stuff and marked it up.