Absolutely agree with @mayer ..after sales support is what makes the difference. There seem to be no consistent OEM quality batteries supplier out there..major Apple suppliers for years nowadays kick in the market B/C grade batteries , showing all sorts of issues. When reputable suppliers/manufacturers start leaking into the market such awful products nobody can be really sure of anything..I believe bigger retailers as iFixit or OWC suffer from this as much as end buyers, despite the fact they have big volumes to trade in. It’s hard to give any advice besides choosing well the seller who takes responsibility for its products.