This charger has been discussed often and at some length. A quick search turned up the following. There’s lots more if you care to look. 
From HKJ: Review: SysMax/NiteCore Intellicharger i4 V2 Charger
Other opinions:
Intellicharger i4 v2 or xtar wp2 II | BudgetLightForum.com
Fake chargers (XTAR, Nitecore)!!! | BudgetLightForum.com