Full Version: Batteries and hot weather
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Decided to use 7D2 for v the first time after 2 months, However camera didn't start even after changing 3 batteries.
I remember all 3 were fully charged last time. So I thought the camera was defective. 
However after recharging batteries all came back to normal. 
It's well known car batteries struggle in Qatar weather, nobody gives more v than one year  warranty and even known brands v fail during this first year.
It seems like li-ion batteries struggle also in hot weather.
Keep this info in mind when traveling/living in hot weather