Chosen Solution

Hey guys, Recently bought an early 2015 MacBook Pro 13" which had light water damage. Opened it up and gave it a quick clean (rice everywhere…) Only problem I can see is the MacBook can see the battery but wont charge and says it needs replacing (only 17 cycles) The MacBook only works when connected to the charger. Now I have a 2014 MacBook Pro 13" which functions normally. Can I plug that battery into the 2015 model to test that it definitely is a problem with the battery before buying a replacement? Don’t want to waste money buying a replacement battery if that wont fix the issue. Cheers! Update Info from coconutBattery

The batteries are different and at 17 cycles is most likely not the issue. It’s also a very difficult replacement. Here’s some info on it: http://www.everymac.com/systems/apple/ma… First see if you can get a better idea of its status by downloading and running Coconut Battery: http://www.coconut-flavour.com/coconutba