[sassan]

I have tried very many different third party batteries (Including LP-E6 that is the same for your 7D II) for many other Canon cameras and never have had a problem with any (Untoward problem). Only the very first batch of these batteries were non-decoded that is camera body would not recognize them for reporting charge left, but following ignoring the initial error message, they would work as expected. Later products (Probably all that is in market today) are decoded so will report the correct charge left etc and are 100% compatible to original ones.
All the batteries in my hand, have performed decent service for at least a year time, mostly a lot more. Some batteries died earlier than Canon, some still going on, but then when paying a tenth of price, that is not a concern.
Last thing I can recommend is to look at mAh. Usually the higher it is, the better and longer service time/charge, even the mAh is higher than the original Canon. They worth that extra few bucks you pay initially.