Perhaps you didn't understand the article then, which is tracking battery capacity. Above comment was noting that its possible after a couple years a MBA (with its non-user replaceable battery) wont hold much charge compared to new, which means Apple will need to service it if you want to maintain battery life. I think its a legitimate problem, and a good reason why my latest laptop has a replaceable battery.
This has plenty to do with the article, you know if you read both.
Popped up to explain myself. It appears that certain themes on HN attract down votes rapidly. Such as:
1. Criticising Apple's policy on repairability.
2. Suggesting that drugs are bad for you.
Two pretty pragmatic things on which I have a lot of experience of as a) an electrical engineer who did a lot of work with power conversion, charging and energy efficiency and b) someone who is married to a mental health nurse. Well when you attract a -4 instantly for both comments that suggests that there is a group opinion on HN. Rather than discuss the matter sensibly like adults, the prevailing approach is to quickly down vote a post so it is seen as irrelevant and to push the group think. Perhaps a worse thing to down vote is someone who asks for proof of an argument past an anecdote i.e. "shit or get off the pot".
This is as damn near religion as anything else and is not what I expect from a news site which is primarily technical. I expect a degree of intelligence.
Now this is an experiment for me as well because I have another account with the ability to down vote and over 2000 points against it. NEVER have I down voted a single post as I don't feel that is appropriate. Unfortunately it appears that anyone with a green label is treated as unfortunate fodder and easy money for the entrenched elite, the agenda-ists or the company shills (Google, Apple for example which are hard to say something bad about here without attracting down votes).
To solve this, I would rather that the down vote link is removed from HN and that if anyone finds content objectionable then they should flag it rather than spank it to oblivion.
I understand this forum has extreme moderation and dubious policies regarding such things but there is no excuse to be a pit of elitist assholes of the technical community. That is currently the only badge that HN can wear.
I expect better and I'm sure the majority of people do as well.
Reddit has a better moderation policy, a more rational and open minded user base and arguably better technical content in some subreddits. That's saying something.
Certain themes on any community forum will attract negative attention. Your problem is you get upset that people don't behave the way you want them to. You can expect whatever you want, but your expectations are not in line with reality. I highly recommend you accept reality and deal with it like an adult, rather than whining and moping about when things don't go your way.
If you begin comments with "You are quite clearly an absolute dire example of a complete fucking moron", you can expect downvotes and flags, and if you end them whining about downvoting, you can expect more of them.
