how long does your existing unit last? if it's longer than 30 mins then nothing wrong with existing circuitry and confirms 'shooting from hip' response
I think when new the Lezyne battery would last about 90mins on full power..even 3 years later it lasts about 45mins, 15 mins longer than the 'new' Ultrafire one.
defective battery
how long does your existing unit last? if it's longer than 30 mins then nothing wrong with existing circuitry and confirms 'shooting from hip' response