If you dont know.who mike singer is and about his alts you really dont know this hobby wellto be quite honest i've never even heard of Singer. Mechman is legit i'd stick with them.
That could also be a batt going bad...I see a lot of people running both and haven't heard many people having problems with theirs.
I went with DC and have had problems with it. Started okay giving me high voltage but dips my voltage very low.
He has a thread right now about the issue.That could also be a batt going bad...