i used to put em in the car at the A/C at full powerI have 1 tb47 and 7 tb48, with 3 chargers. It definately is not enough to do constant filming, I found that about half an hour downtime was needed during the day to let the batteries catch back up after charging, but I am in a very hot area and they take at least 30 mins before they cool down enough to allow them to charge

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