MagSafe 2 power adapter
What wattage of MagSafe 2 power adapter should I buy for my MBP 15- inches Retina display early 2013. I lost my adapter at a public library today but I never care to check how many watt my adapter came with ( 85W, 60W, 45W Or or or) .Please help.
Thank you
MacBook Pro 15″, macOS 10.14