I recently replaced the battery in my MacBook Pro but it takes way too long to charge for some reason.
I returned it and was given another one so that ruled out a faulty battery. I have tried everything from resetting the SMC/NVRAM to restoring the MacBook to factory settings etc but no luck.
I've also tried different chargers but that didn't help either! Any help would be greatly appreciated!
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Let’s start with the basics just in case you missed something. Give this Apple T/N a good read and walk through all of the points: Apple Portables: Troubleshooting MagSafe adapters
Do make sure your using the correct charger: Find the right power adapter and cable for your Mac notebook Do be careful on the source of the charger as there are quite a few fakes which are not safe for you or your system: Lacking safety features, cheap MacBook chargers create big sparks & Counterfeit Macbook charger teardown: convincing outside but dangerous inside
If you are still having problems after going through these steps you’ll need to work up the chain you may need to replace the DC-In board following this IFIXIT guide: MacBook Pro 15" Unibody Early 2011 MagSafe DC-In Board Replacement if the contacts look melted or stained.
Beyond that the voltage comparator logic on the main logic board may need to be checked. This will need a deeper set of skills and tools to diagnose & repair.
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