Why do I have to re-set several times a day?

I have to manually reset my tracker several times a day. The app shows the battery as "full". When I charge I only get one light.

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

crwdns2934109:0crwdne2934109:0

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