Shocking lack of warranty coverage from Rectron

Rectron has now had my 3.6kWh Dyness B3 battery for over 6 months. They first claimed it was water damaged and irreparable, but once I pointed out how that doesn't make sense, they began claiming there is nothing wrong with it.

Within a month of receiving the battery, it had an issue where it would shut down randomly. I informed Dyness of the problem and proved that it was happening. They recommended I do a full cycle test, which I did and the battery "passed". They did not have any other recommendations other than to bring in the battery.

Because the battery could go for up to 2 months without having a random shut down, and the RMA process would take weeks if not months, I lived with it. However I wanted to get the issue sorted before the 1 year warranty expired.

I was told the battery had water damage. I cannot explain how implausible this is. The battery has been in my living room since I got it. They were not able to say if it was my fault, a manufacturing defect, or corrosion as a result of the battery itself failing. However they are using this excuse to deny my warranty. They said the battery is "irreparable". After months of requests, I received a 50 word report making reference to this diagnosis.

I complained about this, and stated that their theory did not make sense. At which point I was told they were looking into it, and would do the repair as an exception, and not because I was entitled to any warranty coverage.

They then stated that the battery had been investigated, and there was nothing wrong with it. It had passed a full cycle test (remember that from earlier?) and did not need any components replaced. They said I should pick it up.

I asked incredulously how the battery had been upgraded from "irreparable" to good-as-new, and how they could diagnose an intermittent issue with a single cycle test. I received no response to my questions.

Much later, I got another request to pick up the battery, I explained the situation and was assured that someone would investigate and get back to me. Again it has been silence for over a month.

I don't understand how you can treat customers like this. These batteries are sold with a TEN YEAR warranty. Mine had problems from the beginning and they have been militant about denying my claim.

CAVEAT EMPTOR