using any lighter fluid other than the naphthalene type
Jailbreaking will void your iPhone's warranty.
Yes, of course.
No. it justs voids apple's warranty.
Yes, rooting an Android device voids warranty ! But sometimes that depends over the carrier some vendors follow the rules to void the warranty after rooting the device and some doesn't.
Many brands have lifetime warranty's, such as Drifter.
Voids warranty.
The Endurance TF6i treadmill comes with a lifetime warranty.
Yes of course, and it comes with a lifetime warranty.
Yes, if your jailbroken device crashes then it voids your warranty.
Yes, jailbreakig is legal but it voids any warranty you have.
If you are really in love with your zippo you are most likely only in love with the outer case, seeing as how the insides are the same. A new Zippo will cost you roughly $15 (median) and you can just take the guts from the new one and insert them into your old case. In summary, sending in your Zippo is a waste of time.
Coby offers a lifetime warranty on their clock radios.