I bought the CF-53 in August 2023  with a one year warranty.  After four months it suddenly wouldn't power up. Batteries were tested and were good. For two weeks I attempted to contact the seller with no response. I got with  Amazon who attempted, unsuccessfully to contact seller (for three weeks). In the end Amazon said there was nothing they could do as the warranty  was held by the seller, not by Amazon. This demonstrates to me that this warranty, or any guarantee by this seller means nothing.