Sadly I purchased the SC2 from IMR without researching reviews. Charging brand new HG2's to 4.25v is what prompted me to look into this deeper. I did find a Youtube review that exposed the over charging issue, they showed a 4.29v charge on a 18650. I have found mentions (and quotes) online (Reddit) of @Mooch putting out a "Do Not Buy" recommendation on the SC2 but can not find the actual source written by Mooch. Does anyone know where I can find it? From what I read there is also an overheating concern. One frustration was the user manual, as well as different reviews, state to enter manual mode you press the button over the slot you want to adjust. This did not work on mine. After a lot of wasted time I discovered 3 quick presses of the button over the desired slot puts my SC2 in manual mode. I do not know if this is a problem with mine or the SC2 has been updated to require 3 presses and the user manual was never updated and the new version was never reviewed. 3 presses is no problem, being told to press the button over the slot when you need to press it 3 times is. I guess the manual mode is kind of a mute issue, overcharging and reports of overheating has my new purchase headed for the landfill.