Most packs that are out stock will be back in stock by the middle of May.
For those looking for our 6400-150C speed run/drag packs the 2S and 4S are out of stock and we will not get anymore of these in. We are in the process of wrapping up testing on a new cell with improved performance that will replace the 6400-150C packs. If there is no extra delays we expect to get the first shipment of these by the first part of June.
With our flight packs getting very good feedback we are offering them at a very special price until supplies last. You can check them outHERE.