Your mechanical, semimechanical, protected, or boro vape mod frequently experiences power loss. But the battery is freshly charged.
The good news is that this problem is usually easy to correct.
Check the (rebuildsble) atomizer for circuit faults on a separate, known working mod, preferably a non-boro, protected mod with an an ohm meter. If mecessary, rebuild and rewick the atomizer. Ensure that all electrical surfaces, including screws, are wiped clean. If necessary, select a new coil.
If the atomizer appears to work with other mods, then the problem is likely poor electric conductivity elsewhere in the system. For example, the big drip tip screw that completes a boro mod's circuit. Dust, dirt, ejuice condensate, and other debris will naturally accumulate on electrical components over time.
Remove the battery. Wipe suspected surfaces with a qtip dipped in rubbing alcohol. Including metal surfaces that ordinarily contact the battery. Dry the wiped components. Reassemble, and test again.