Hi, I recently bought a 2012 Macbook Pro 13" (because this is the last "upgradeabe"). The battery has only 300ish cycle in it, so you can say it's in pretty "good" condition, but I feel it's depleting very fast. I'm not using it for heavy tasks, 'coz I have a dedicated desktop, but it's running High Sierra. My question is, is it advisable to replace the battery with a new one? The other issue is the charger. This mbp is from the US, but i'm living in hungary. When I plug the charger (even if i plug the charger first, and laptop as second), it creates a huge (I mean huge) spark. I've never experienced such a phenomenon, yet I had a few laptop, and if that was not enough, under load, the charger gives an audible electric noise. Should I be worry about it? I'm thinking to replace it aswell... Any advice? Thank You very much!