How do I fix "change the battery pack" error?

I have two battery packs that i have charged fully and both are still giving me this error on the camera. I know this is an old camera but hasn’t given me any problems.

Cannon XTI

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0