Ditto what Ken and Chuck said. If the battery will fit , the T-28 will handle the weight as far as normal flying goes, but you will be loading that wing a bit. This means pulling out of a high speed dive or doing hard outside manuevers could fatique the wing very quickly with that much weight. I also use the Flight max batteries Chuck linked to as well as the Zippy Rhino batteries, either would be a much better choice.