t-tip or l-tip power adapter
t-tip or l-tip power adapter: as long as it is 60w is that fine?
ref:
early 2009, shows T-tip
https://support.apple.com/en-us/HT201700
Apple store has L-tip
As long as the pin configuration (MagSafe vs MagSafe 2) is correct it does not matter. I have used both with my 2011 MacBook Pro.