Ring Doorbell 2 Battery Fully Charged but apps is showing 5%

Hi there, I have been using my Ring Doorbell 2 for a while and it has been working great. Recently, the app (on my Samsung phone) prompt me that the battery is low and requires charging. We charge the battery fully and reinserted it back to the doorbell but the app is reflecting the battery life as 5%. We tried installing and uninstalling the app several times but it still shows 5%. We also make sure that we charge the battery till it shows the green light only. What else can we do?