Hi all, I've got a 2012 Retina MacBook Pro bought new, 4-ish years ago. For about six months, it's been giving me a "Service Battery" message, but since I rely on it heavily and I very rarely unplug it, I've yet to do anything about it. About 3 months ago, the cable on my charger started to shred away and became potentially dangerous. I bought a replacement. It was advertised as a Genuine Apple product, but it wasn't from the Apple Store and was slightly cheaper than their prices. It came in plain cardboard packaging. It worked OK for a couple of months, then the charging light went...and then it started making crackly electrical noises around the MagSafe connection...just like the original (but considerably shorter into its lifespan). I've contacted the seller who I got the charger from and they have agreed to a return and a replacement (sadly, not a refund) but there is another issue, and I'm not sure if it's the battery or charger at fault: For the past week, the battery is no longer being charged. It's stuck on 90% and, while it's not consuming any further battery while it's plugged in, it's not reclaiming that other 10%. I've only been able to test this with my current faulty charger as I don't have another Mac charger available to me. Is the battery charging issue symptomatic of the dodgy charger...or the battery needing servicing? Obviously I need to sort out both, but it determines how I proceed from here. Anyone else seen this behaviour...was it the charger or the battery at fault?