Regenerative can be very useful in these two situations of battery industry: large-scale of batteries discharging at the same time or very large capacity batteries discharge at very high current/power. For the traditional battery testers, the discharged energy will be turned into heat, it’s not a big problem when there’s only small amount of batteries, neither the heat nor the wasted energy is much. Part of the energy will be consumed by the MOSFET, mostly part of the energy will be turned into heat, not only it’s bad for the instruments(heat can largely affect the stability and accuracy of many kinds of electronic instruments) , people also have to use air-conditioner to cool down the room, that’s extra waste of energy. There are 2 solutions of Neware Energy Saving testers: BTS4000 with energy saving feature and IGBT. Neware BTS4000-ES is based on Neware BTS4000, mainly for large scale battery cells and packs formation and grading in battery factories. Neware IGBT series is mainly for huge battery packs charging and discharging. Comparing with none-energy-saving technology, both of Neware BTS4000-ES and IGBT can largely reduce the heat emission ratio and the equipment dimension. The discharged/regenerative energy from the discharging batteries can be used to charge the other batteries(which are in the charging stage) on the same machine or returned back to the power grid. So if you are battery makers or need to test batteries in larger scale, then regenerative testers should be the better choice.