Testing some sodium ion 3V 1300mAh 18650 cells from AliExpress made by Seekwatt. Measuring the mAh capacity, Wh energy and the charge and discharge curves. Na-ion batteries use much more abundant sodium instead of rare lithium. Are they the future of large scale energy storage? Please support my channel on Patreon: https://www.patreon.com/DiodeGoneWild Instagram: https://www.instagram.com/savage_danyk/