These were warranty replacements. I have messaged stark asking for return labels and have not received a response. Would like to get them out of my garage. One battery only chargers to 66% and the other arrived with a broken HV connector. I have a replacement amphenol connector to replace it, just haven't had the gumption to do it myself. I was told from stark the the battery that charges to 66% was from a debonded cell, theoretically could be soldered and back to normal. I also considered making a new housing to make a light weight pack for FMX/short rides. Understand these are not new and not under warranty. Message me with questions.