According to the guide at runescape.wikia, they don't normally wear out at all - however, if you die wearing them, they will be worn out. They can be recharged with Fist Of Guthix tokens.
Unlike most other rewards from the Fist of Guthix minigame, Rune Gauntlets will not wear out through use or time. They will only become degraded if you die with them or if you ask Reggie to degrade them for you. Note that Rune Gauntlets are only tradeable when they are completely degraded. You can ask Reggie to degrade them for free.
they get discharged ONLY on death.
About 60 hours with dragon hatchet.
6 minutes
a few minutes.
1 MONTH FOR CHEAPEST
its PERMANENT!....forever...
Any as long as you have 60 Attack and have done the Lost City quest.
Corrupt Dragon items last up to 30 minutes.
No, it will be returned to you, you can collect it form a banker.
the dragon amulet from dragon fable... Once you buy a dragon amulet, it will last forever! UJJOL NOOR KHAN NOOR KHAN NOOR
forever