battery grip and AA life..?

check out this link

http://www.expanxe.co.uk/products/promo/promo.html


for rechargable Alkaline AA batteries although they say not suitable for digital cameras ( I don't know why) but ok for flashguns etc.

I use rechargable AA batteries purchased from 7day shop their own brand and they havn't let me down yet.

Just an idea

Realspeed
 
I currently have 6 x Duracell M3's in my 5DII and they're still showing a full charge after ~400 shots.
 
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