Other go pro questions

Location
Vegas
I have a go pro 3 white edition
I have a external battery pack I've noticed that

1) after the external dies the camera only wants to film for 5 seconds then it shuts off till I remove the external pack then it will film regularly again. I've missed out on some f******g killer footage because of this

2) if I leave the external and the regular pack plugged in during storage they both die


Is this wrong? Or anything I can do to prevent this? Thanks!
 
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