If you search enough you can find issues/faults with pretty much any light out there,surefire to fenix to whatever.
If you put d25a fault in google,chances are it will bring you to here on the 1st page of results,same with pretty much any make .
Not just lights but cars too,head gasket on XXXXXX car..........you would never buy a car :laughing:
So a little more serious,i can recommend the d25a ti,its a little beautifully made light for the money.The UI i find good(not amazing just good),head tight turbo and strobe by clicky select.Head loose and modes,go through modes twice fast and flashy disco time.However they have to be gone through quick twice,at any time one 1/2 press for longer than 0.5 seconds stops the next level and returns back. Not prefect,but does not take long to get used to,and works well.
Issues can be from threads not being clean for example too...........
Its a very popular light for a reason,great value,can run on AA or 14500 3.7v cells(obv not for prolonged periods due to heat) and it does increase all the modes ,low/med ETC brightness although it retains them.So low is now a brighter low,if a low low is used then an AA eneloop would be better in use for example........
As its popular you will always get an issue or 2 reported.........same with anything,sell a 1000 of something i am sure 1 will have issues,that 1 person posts "d25a wont turn on,wont this,wont that "all of sudden the d25a is a risky buy as now 10 people in 10,000 have issues............just examples ,no figures,no surveys done just a point
So if you like them,buy one like i did,i bought mine on the back of the d25cvn ti as i loved it that much i had to have the d25a ti,regrets YES!!! I should have got one sooner
As i like a pic,just for you dqg brass and spy with d25cvn and d25a ti
My d25a ti food
The holster is of good quality too
The d25c ti is another option too being that little bit smaller
Another option is the v11r with extension,this will run on AA/14500 with extension and 123/16340 cells
Next to the d25c
I would say its a little big for a key chain light imho so i have the dqg spy on mine but obviously not a thrower(little wall of light so flood)
cheers ven
Edit -presumed d25a,realised after d25c but have it covered,sorry about that ;-)