[Android Central Question]

My galaxy note 5 recently started acting up.wont fast charge.its keeps saying will around 4 hour to fully charge.

[Rukbat]

That could be a bad charger, a bad cable, a bad microUSB connector in the phone or a bad charger (circuitry in the phone - the thing you plug into the wall is actually just a power supply). If you don't have a spare charger, a spare cable, can't diagnose the phone, you'll have to bring it into a shop to diagnose it.

[L0n3N1nja]

I don't have my Note 5 anymore but if I remember right there was an option in the battery settings to toggle fast charge on/off.