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Question: LCD Battery Grip: Do all the button functions work perfectly with a T3i?  any glitches?
Document: The battery grip purchased is superb for its price. It lines up perfectly with my camera without any problems. Also gives it the perfect balance. The LCD meter can be easily viewed..
I had to return the item because it didn't work. The LCD screen was frozen with some numbers on it, and my camera wouldn't work with the grip attached
Other than that im happy with the unit and have added a star.------------------------More comments! It has been 5 weeks with the new grip now.As I stated previously I was able to fix the frozen LCD display. Replace the CR-1620 button button battery that powers the LCD display. The button battery was dead/weak when I received the item.
Replace the battery with the spare battery that is included and you the buttons will work again... The timer won't work but the buttons and display will work.Here are the steps to change the battery:1. Open the battery pack tray.2. On the wall behind the intervalometer display is the button battery cover.3. Push it down and away from the wall to open the battery cover.
The useable shooting time has been greatly extended and the relocated shutter button and dial is great. Instructions real sketchy and lack in several areas. Common sense and a few blog sites and you can fill in the blanks. The clock on the back doesn't seem to hold time well but, that is why I have a watch. All in all, I really like this battery grip and would buy it again, actually will be buying another one soon for my other camera.
After reading all the other reviews I decided to take a chance with this grip. I received it yesterday and mounted it to my Canon T3i camera.--The build quality is very good.
This feature is supposed to make the camera take a programmed number of photos over a given length of time. The instructions were terrible but I am very good with figuring out gadgets. Anyway after setting an interval program and hitting the "perform" button the LCD froze up! I tried to put it back in date/time mode and it would not change screens. I powered the unit on and off several times but it remained stuck on the interval screen. Nothing seems to fix this problem.
Can I live with this based on the fact that I only paid $39.95? It still gives me twice the battery power and does everything else it is supposed to do.-------------------------------One week later- Update! i was able to unfreeze the screen by replacing the lcd button battery with the included spare . its was a little bit tricky to replace.
The Battery grip is great, this can take time lapse perfect, i do videos and photography and its works very good.
Great price and quality. I recommend. The battery grip is a very useful accessory. The product is very well built.
Answer: Mine is broken. The very first time I tried the display on LCD screen is malfunction. I got broken letters. The Canon T3i appears dead (no power) when attaching the device. I still have the unit because I miss the window for return by Amazon policy.  Don't know what to do with this product :-(