This is what I did when purchasing the CWK battery.
The seller's feedback was (and still is) excellent. The CWK batteries are sold for multiple laptop products, including non-Apple products. A seller's high feedback for a product line they sell is not indicative of long-term product performance: the problems arose well after providing positive feedback, with no warranty recourse for the product. The most I could do was to write a review on the product itself, describing its long-term performance failure, in the hope that future buyers will heed that in their buying decisions.