off-Canon LP-E8 Rechargeable Lithium-Ion Battery Pack (7.2V, 1120mAh)

You have every good reason to be asking. Not everyone has had good experience with third party batteries. This one:

http://www.amazon.com/Photive-Original-Capacity-Battery-Replacement/dp/B006Y0YZZ6/ref=sr_1_2?ie=UTF8&qid=1357578467&sr=8-2&keywords=lp-e8

for example, looks good, right? I put it in my camera and it just balked. No lights, no action, no camera. Worse, loading it in original Canon charger and it would blink orange slowly like, never turning green. I had to send it back. Huh? A fluke? A one-off baddie? Perhaps. It cured me of wanting an off brand.