Technically Eufy selling them through Temu, bought two and a replacement battery for the doorbell cam e340 with no issues. Registered them through Eufy and they appear to have a warranty on them.
I had to contact the seller through the Temu app, it loaded eufy support, now they’re waiting on eufy to “reship” if not I’ll be refunded. It did not ship with the C210, that packing slip actually looks like it came from Amazon, and only states the one item. Hopefully they just failed to provide a second tracking number…