The cost of the battery is only ~10-20% higher than the bill of materials â suggesting a potential long-term competitive price for Lithium Ion batteries could approach ~$100 per kWh. Tesla currently pays Panasonic $180/kW for their batteries, although conventional systems still selling for $500-700/kWh.he cost of the battery is only ~10-20% higher than the bill of materials â suggesting a potential long-term competitive price for lithium-ion batteries could approach ~$100 per kWh.
n, pl -nies. 1. a declaration of truth or fact. 2. (Law) law evidence given by a witness, esp orally in court under oath or affirmation. 3. evidence testifying to something: her success was a testimony to her good luck.
1 To serve as evidence: wreckage that testifies to the ferocity of the storm. 2  To declare publicly; make known: testifying their faith. 3  To state or affirm as testimony in a legal case or before a deliberative body: testified in court that he saw the defendant.  To be evidence of: His frown testified his displeasure.