I'm sorry to hear that you suspect the PowerShot ELPH 300 HS that you purchased from eBay may be used. The lanyard (wrist strap) should typically be in the box with the camera and not attached. The battery itself should be in it's own plastic bag outside the camera body, in the box with the other loose items. We do not ship cameras with the batteries pre-installed inside camera body.
Here is a list of all the items which should come with a brand new, in box PowerShot ELPH 300 HS camera.
~PowerShot ELPH 300 HS Body
~Battery Pack NB-4L
~Battery Charger CB-2LV
~Wrist Strap WS-DC11
~AV Cable AVC-DC400ST
~USB Interface Cable IFC-400PCU
~Digital Camera Solution CD-ROM
2/07/2023: New product announcements!EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM