Is it normal for apple 14 to fall to 90 in half a year?

Normal. Apple 14 battery health drops to 90% in half a year, which can be regarded as the edge of normal situation. Usually, it is considered as normal battery loss that the battery of Apple mobile phone drops to 90% within one year. However, if it drops to 90% within half a year, it may indicate that the battery loss is faster. If the battery health drops significantly within half a year, it is recommended to contact Apple's official after-sales service or go to an authorized maintenance center for inspection. Apple can provide professional advice and solutions, including battery replacement (if qualified) or other maintenance services.