I've ordered over a hundred items from AliExpress and only once had a fake tracking number claiming delivery which USPS was unable to corroborate, for a low dollar item. Biggest package I ordered was around $800 worth of solar cells, via DHL. I'd never lost a dispute that the seller went hardball denial on, AliExpress always ruled in my favor, me being careful to give appraisal of the market value of what I'd received and if appraisal/evidence was difficult then not asking for more than 20% refund (seems to be a magic %). e.g. A good picture of each very swollen cell with a ruler should get ~20% back for each of those affected cells easy (via Aliexpress mediation, not necessarily seller). Don't be punitive or focus on the cost/inconvenience to you, focus on the market value of what was received. Otherwise there is the risk of AliExpress falling back to their policy of a full refund only if you ship it back.
Stick to older AliExpress sellers with 1,000-10k+ lithium battery sales with good reviews, and sufficient details (e.g. weight) in the product page to use in a dispute. e.g.
liitokala Official Store,
liitokala Factory Store,
MEIBrandauthorized Store,
Tewaycell Store at a glance. I thank these forum members for pointing out the used or B-grade nature of said products (the need to order spares), and incidents of fraud (e.g. stones in battery, relabeling/resleeving smaller capacity with larger capacity, grossly mislabeling product). Also, use a cash back service such as '
Giving Assistant' for ~5.5% cash back (caps at $43 total back of ~$780 in cumulative payments, sad they added that cap this year...).
EDIT: Also if the cells don't arrive around a week before buyer protection ends then you have to message the seller to extend protection. If they don't extend then you open up a dispute (before protection ends!) asking for full refund, and no matter what you do, do not comply with the seller in asking you to close the dispute (they can be very persuasive), they lost that chance by not extending buyer protection. Wait for AliExpress mediation to step in and give full refund for non-delivery and failure to extend protection. I've had to do this 3-4x where the seller doesn't refund voluntarily and it is a headache, and risk of loosing money for forgetting about something you ordered 3 months ago...
EDIT2: A negative MEIBrandauthorized Store forum review
here and
here. In the first circumstance one should ask AliExpress for a refund of the difference between the 310Ah cells and the ones received, ~18% refund for the 3 better cells, more for the 252Ah cell, appraising using prices from the same store. Due to the risk these AliExpress used/B-grade cells may indeed be priced too high in comparison to grade A cells from other channels. Then again maybe they're fine depending on the use-case, like home storage rather than vehicle, you're able to gather the necessary evidence in a dispute (which may include long video), and buying extra cells to compensate for the risk of duds. If seller/AliExpress won't offer replacement/refund for the duds at no cost to you then I think a chargeback is not unreasonable, the seller should have never shipped those in the first place and recycled them domestically. Giving them a quote for $1.5/lb or whatever your local recycler offers would be market value, and they get to eat shipping costs and you can still use AliExpress for other supplies. Probably best not to buy batteries on AliExpress