Can't say about Xin TD. but my C8 and UF-2100 with Nanjg 105C AMC7135*8, 2.8A installed run on 2xCR123a 3.0V very good, even Uf-2100 runs on Hi (but very! hot). Effeciency of the driver is only about 65-70% (30% is converted to heat of the driver :( ) with high voltage, but AMC7135 is rated to work up to 7V peak. None died yet.