Ive seen bad reviews for the Sams club Gc2 It might be one thing to read reviews of an item that pretty much CANT be jacked up by a moron vs reading reviews of something that can easily be destroyed. I bought an 13 yr old tt with two interstate gp24 and one was still working. I’ve used a group of sams gp27 for 48 volts and replaced them as they died. YES they were drastically mixed and worked just fine. The pack started in 2008 and one was still working fine in 2019. It’s all in how they are taken care of. More die of under charging vs over charging
