Is it safe to use a Apple 85W MagSafe 2 charger on a 2011 15" MBP that originally came with a Apple 85W MagSafe 1? I have a extra MagSafe 2 charger already available. The original MagSafe 1 charger has the cable sheath splitting in multiple places. The old sheath has become brittle with age. I hate to spend the money on a new charger for a backup computer that just sits around. I rarely use it anymore because it is a ticking time bomb (it had the motherboard changed because of Radeongate the end of 2015). It still works fine since the motherboard was replaced, but I have moved on to a 2015 MBP as my primary laptop. I just keep the 2011 as a emergency backup.