TIP SE (NiteCore) turns itself on then can't be turned off for over half hour?

[KITROBASKIN]

Then it seems to be fine for a day or two then does it again. This is reported from a handyman friend of mine. I asked if it had gotten wet; he said no. Told him sounds like an electronic switch issue. He is not going for a warranty replacement. Any ideas for a fix or diagnosis?

 

[Monocrom]

Hate to say it, but the TIP is one of the least reliable models Nitecore makes. Speaking from experience here. The buttons on mine literally popped off after only a couple of weeks of owning it. Best solution, zero sarcasm, replace it with a completely different model.