I have no qualms whatsoever using those $35 Wasibi batteries in our new $2500 Canon camcorders.

That being said, I bought a spare battery several years ago for my Canon T2i, it was an Opteka (also cells made in Japan). It claimed 2000 mAh (wt = 40 g) vs the Canon's 1120 mAh (wt = 45 g) yet it doesn't last as long as the Canon version. Blatant misrepresentation.

I found the Wasibis are available on Amazon Prime also. Over 1200 reviews, ave 4.3 stars, and these were for pro cameras. http://www.amazon.com/Wasabi-Power-B...ews/B0041MY32Y