Apple has set a standard for iOS batteries, stating a normal battery is designed to retain up to 80% of its original capacity at 500 complete charge cycles when operating under normal conditions.
Phonecheck will now have a default setting, the 'Battery Warning' message, a defect warning that will appear if an iOS device’s battery is less than 80% Battery Health or when an iPhone has an internal Battery Health message.
Even if Battery Health and Fail Criteria Settings have been set up in Phonecheck, these are separate criteria. (BH-A, BH-B, BH-C, and BH-D)
The Battery icon will show a red icon even if Battery Warning is disabled, disabling the 'Battery Warning' will only ignore the defect.