Battery not holding a charge

I am having trouble with the battery in a 2 month old solar spotlight. The other night the camera was offline and it did not come back during the day while it was sunny. I took out the bettery and chareged it fully until only the green light was lite and I removed it from the charger. That was last night. Today I took the battery out and put it back in the spotlight and it came back online but gave me a battery warning. The app indicates the battery is at 19% even though Icharged it yersterday and let it off charge overnight. I see these possibilities: 1) The green indicator went off before the battery was fully charged 2) The battery discharged overnight without being conected to a device 3) The battery indicator in the spotlight is not working. I guess the best thing to do would be to try another battery but this is my only battery powered Ring device. My other devices are hardwired. John