Please help me understand why the bp-819 w/ 2780 mah rating cost less than the Bp-827 which has a rating of 2680 mah, the Bp-827 Almost cost $50.00 more than the Bp-819 and is always stated than the 819-only last 2-3 hrs while the 827 last from 4-5 hrs? With the mah rating isn't it the higher the mah , the longer it should last.:confused:

Please help me understand why the bp-819 w/ 2780 mah rating cost less than the Bp-827 which has a rating of 2680 mah, the Bp-827 Almost cost $50.00 more than the Bp-819 and is always stated than the 819-only last 2-3 hrs while the 827 last from 4-5 hrs? With the mah rating isn't it the higher the mah , the longer it should last.:confused:

where did you get your info?


BP-819: 1780mAh

Canon USA
http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=269&modelid=17384#SNAModelSuppliesAct


BP-827: 2670mAh

Amazon
http://www.amazon.com/Canon-BP-827-Lithium-Battery-Camcorders/dp/B001DYLGM8

Adorama
http://www.adorama.com/CABP827.html