Upgrade General Performance and Changing Battery
5 - 30 minutes
After upgrade to OS El Capitain, my macbook was too slow. On the same time, the battery was down for an intensive use during 6 years.
Perfect!!! The battery was fitted and recognized by system and my macbook accept 8 gb of ram. The HD was ok and i used a software called "trim enabler" to activate TRIM SUPPORT for non-Apple HD.
Great idea to supply the HD Kit: if you don't have the correct tools, it's very hard to fix a mac.