This Waters M486 Tunable Absorbance Detector with a Fail 1 Battery Error upon start-up. So when I fire up this unit I get the battery error but if I let it warm up (approx. 5 min) I am able to cycle through the calibration, reference, wavelengths, and sensitivity settings. This item will come with a new heavy duty 15' power cord (as pictured). Unfortunately because I am unable to test this unit any farther, I am forced to sell it without any guarantee other than a DOA guarantee. The price will reflect these issues. If you have any questions about this or any of the items that I have for sale here on eBay please do not hesitate to contact me.