У вашего броузера проблема в совместимости с HTML5
How to add a battery protection and balance board to a 4 cell Lithium battery pack.
4S 30A 16.8V Li-ion Battery BMS with Balance http://bit.ly/4SBMS_Bal
ANENG AN8002 Multimeter Temperature Tester http://bit.ly/ANENGMultimeterTempTest
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