HPQ Silicon’s ENDURA+ lithium-ion battery cells have received UL 1642 certification, a US safety standard required for commercial acceptance of lithium-ion cells. The certification covers its cylindrical 18650 (4,000 mAh) and 21700 (6,000 mAh) cell formats and clears the cells for US commercial sales. The company says the UL 1642 milestone follows its earlier UN… Read more…