Chosen Solution
I have bought laptop batteries on ebay and yes, even the expensive ones are usually at very low capacity after only a few months. Ifixit has a vague clause about its battery warranty here: The iFixit Guarantee
Are there any specifics? I am looking at MacBook Air 11" (Mid 2011-Early 2015) Battery for my mid 2011 air.
It’s 1 year warranty on the iFixit battery. If it starts draining rapidly, dies completely, starts expanding those are covered under warranty.
