Volumetric flow: The most popular way to measure fluid stream earlier a specific place per unit of time is by volumetric stream They are really ALL smart chargers which consider readings from the batteries and adjust the charge based upon exactly what the battery needs to accomplish an ideal demand. https://www.hukums.com/products/stanley-sxwti-ctabl-xx350-hydraulic-table-lifter-with-350-kg-capacity