Special thanks to Icyman.
It was your post on Amazon that pointed me here.
Great Performance, June 1, 2011
Icyman - See all my reviews
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This review is from: Wasabi Power Battery and Charger Kit for Canon BP-827, VIXIA HF S10, HF S100, HF S11, HF M30, HF M300, HF M31, HF M32, HF S20, HF S200, HF S21, HF20, HF200, HF21, HG20, HG21, HF G10, HF M40, HF M400, HF M41, HF S30, XA10 (Electronics)
I have used one of the batteries so far. my stock battery gave me 112 mins. this battery gave me 363 mins. But they are big and will come past the rear of the camcorder 3/4" on a Canon HF M41. the battery is 2-3/8" long. I would definitely recommend this battery. Wasabi is used by many in the community. I posted pics on the avsforum web site. search under camcorder for Canon HFM4xx Owner's Thread. avsforum-dot-com
Originally Posted by Icyman
Wasabi Batteries 3000Mah after market for BP-827
they are big, size and power, without the big price.http://www.amazon.com/gp/product/B0049VMMZ2
363 minutes vs 109 minutes. Both after recharge. I have seen the stock battery at 112 before.