batteries can take up to about 8 hours to charge…depends on the charger,capacity of the cells and rate of charge.
If you don’t have a meter I’d suggest buying a half way decent DMM…one with leads capable of giving you accurate amperage readings . Cheap multi meters are pretty worthless imo .
I think if you buy what members here are telling you is a good deal you’ll find you’ll spend about the same / maybe a little more but avoid wasting money on junk …in the long run you save . Not to many people here would have suggested either the light or the charger you got …the upside is neither were expensive // the light can be improved and the charger isn’t the worst one you could have gotten 
(there are plenty of threads talking about the light…upside is you didn’t pay $59.95 for it )
welcome to blf