clb wrote in post #17650321
How did you take it apart? Was it difficult ?
Very easy. Just undo the screws, not that many of them.
If you don't do this for money, then saving $300 per grip is a pretty good deal, even considering all the "issues".
Some grips are better than others. Even if you pay $100 for 3 grips to find one that works, still better than $300, especially for hobby use.
For multi-cameras, you save even more 
I have owned like 10 or more 3rd party grips and one or two had the battery draining issue.
This is for 10 or more cameras
and one of them magically went away.
For 5D3 I also had three of these at one point and three aftermarket grips - no problems. Maybe have been Meiki or Neewer, don't remember now.
I also had a random no name with rear battery access (the one where you can pop the batteries out the back, no tray required).
Worked great
The quality wasn't the best, but for $30 can't complain and it worked fine for my purposes - holding an extra battery.
I never really used any of the controls but of course they didn't feel that great.
For the 6D grip, I thought I was having a drain problem. I did a tear down on the grip and I didn't see any solder blobs etc., and there didn't seem to be that much that could go wrong. When I put it back together, I didn't notice any more issues. This was like 2 years ago so I don't remember the details anymore.
If it's that bad, just take the tray out when you are at home... or try a different brand / new grip 
That being said, it's your money and you can do whatever you want with it 
I would rather spend $100 for 3 grips than $900 if I owned three cameras... at one point I had like 4 or 5 full frames (for a job).
Spend $200 or spend $1,200+... (In case you are wondering, I sold most of the cameras after the job - almost free rentals!)