The charger is good and stable processes. AA / AAA batteries fit. One should in the product description nor will it list how long Li-ion batteries may be. Unfortunately my Samsung S4 batteries do not fit. I manage me with inserted at the contacts paper clips, clip the battery cross and hit the brackets to the battery contacts. This works, but unfortunately a bit awkward. My camera Li-Ion matches against and is loaded without problems.
I do not want to denigrate the product. When the batteries fit, everything works fine.