Its well known that for cameras the 2 most important power draining operations are:
1. Using flash (even old cameras had to charge a capacitor)
2. LCD screen
And i 've heard (i can't find it on google right now), that there are some camera models, which include an "off" mode, in which you can take pictures the old way.
Tha is, LCD screen off, but you can still take pictures.
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