eli5: Why DSLR (and mirrorless) camera batteries so inferior compared to smartphones?

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I had Canons and Nikon DSLRs and lately a mirrorless Panasonic micro 3/4 and this always bugged me:
How come these camera batteries die within hours while only snapping a few pics here and there, while my iPhone (and I heard many androids are even better) last a full day (or more) doing a lot more processing intense tasks (watching HD videos, taking pictures, browsing the net, etc)
I have to carry 3-4 extra batteries when taking my “big” camera out for a hike and I’m not even shooting insane amounts of pictures.

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Anonymous 0 Comments

Canon 7D

I would regularly shoot well over a thousand shots of lacrosse games in a single game and could easily do multiple games in a single day without recharging

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