While looking through old items, I found a Phantom 3 Standard. Am I still able to use the batteries after around five years? They are currently at one bar (not blinking). Are they safe to charge and use? Any help would be appreciated

Hello, there. Thanks for your inquiry. You may first observe the external condition of the battery. For example, whether the battery has swollen or broken? If not, please charge for a while to see whether it is charging normally. Finally please insert the battery and see whether it could be turned on properly and pay attention to the battery level when flying.