Lasts noticeably longer than the 30T, definitely worth it unless you’re blasting the high end of your mods wattage.
Bought the 30t to start with,the 40t gives me that extra power, give it a go.
Se non siete inglesi scordatevi le batterie, non spediscono al di fuori dello stato
It's a battery, it's cheap, it fits in mods, good all day at 50w.
It's doing a great job so far