delgriffith
New Member
I'm trying to figure out a way to keep cell phones alive that sit overnight in vehicles that are parked outside in northern Minnesota. I was wondering how difficult it might be to engineer a temperature controlled insulated box that stays in the vehicle and is either wired in to the car battery or has a separate battery pack. I thought since it would only have to stay above about 35 degrees F for approximately 12 hours, it might not use too much battery power.
My first thought was to use a vacuum insulated food jar that I sealed the phone into at the end of the day when the vehicles were warm and parked for the night. My phone was frozen solid after last night in the vacuum insulated jar (it was -20F outside). I'm trying it again tonight with some pennies added to the jar, but I'm not optimistic.
Any suggestions much appreciated...
-Dave
My first thought was to use a vacuum insulated food jar that I sealed the phone into at the end of the day when the vehicles were warm and parked for the night. My phone was frozen solid after last night in the vacuum insulated jar (it was -20F outside). I'm trying it again tonight with some pennies added to the jar, but I'm not optimistic.
Any suggestions much appreciated...
-Dave
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