Before you make a warranty claim try these first:
Rifle won’t fire?
Try the battery in another rifle (confirm it’s the battery not something else)
Connect battery to a charger and confirm it’s fully charged.
Battery won't charge?
Try a different charger. The charger you are using may be at fault.
Charger giving an error?
Try a different charger (confirms the charger/battery is the issue)
Try a different battery (confirms the charger/battery is the issue)