Reading a thread today I realized that it's possible to get "third party" batteries from someone such as Sterling Tech for my 400D - a replacement for the NB-2LH. Not only are these really cheap, they are rated at a much higher mAh than the original Canons - 1700 mAh in place of the 720 mAh of the originals.
Is there anything I need to know about using third party batteries? Any pitfalls that make it a bad idea?
In particular - is it possible to use the Canon charger that comes with the camera to charge these batteries, or do I need something different because they're a higher power?
It just seems like such a good deal it makes me wonder why the original Canons cost so much more!


