Those type of 'eGo' batteries are designed for a particular clearomiser (not the one you are attempting to use). They're not very versatile and wont work if ; the atomiser you are attempting to use has a resistance too low for the battery, the connections between the battery and atomiser aren't making proper contact, the battery is not properly charged, the atomiser has a short circuit, the atomiser central pin is too wide for the battery, the battery has crapped out....
Probably time to invest a few more £'s on your kit if you want something more reliable.