Given the provided dimensions, the first of those will almost certainly not fit in a buffer tube. I have pointed you at one (Rebel 11.1v 1150mAh) which will fit. As for the Rebel 1450mAh, I will repeat that I have the 1300mAh version of that, which is slightly smaller in cross section than the provided dimensions of the 1450mAh but possibly the same nominal dimensions, and it cannot be shoved into either of the two buffer tubes that I have access to.
Li-ion batteries are overpriced and not ideal for airsoft; there is no way on this planet that one is going in your buffer tube.
I and others have tried to help you, yet you seem to be ignoring whatever anyone tells you and are just throwing up different batteries at random. This is my last post on this thread.