A traditional charge process for flooded lead acid batteries (FLABs) lasts generally from 8 to 14h. Nowadays, many applications of FLABs require reduction of the charge duration, for instance, a 4h-charge for FLABs in grid energy storage or 1h-charge for FLABs in electric buses. These are called accelerated charge and fast charge. Such reductions of charge time imply the use of a new charge process. One way to reduce the charge duration is to perform an early destratification step without waiting for the end of charge. The new charge method proposed in this paper (early destratification method – ED) focuses on the reduction of the charge time for FLABs using early destratification, which is performed and controlled using charge acceptance measurement during the charge. Laboratory experiments presented here aim first to develop charge acceptance measurements followed by an ED charge method compared to an IUi traditional charge process.