What's the difference between changeless and chargeless?

Changeless

Definition:

• (a.) That can not be changed; constant; as, a changeless purpose.

Example Sentences:

• (1) "He waits for me outside," the 32-year-old says, smiling and raising an eyebrow, obviously in love with her job in football, but also exasperated by the sport's changelessly blokey culture.
• (2) It remains changeless during the whole period of incubation.

Chargeless

Definition:

• (a.) Free from, or with little, charge.

Example Sentences:

• (1) Not only the membrane potential but also delta pH were effective in stimulating the rate of translocation of the chargeless proteins.
• (2) The chargeless presecretory proteins thus constructed were translocated and processed for the signal peptide much faster than proOmpF-Lpp and the rate of translocation was appreciably enhanced by imposition of the protonmotive force.