These are the most common problems regarding battery-draining found on the internet. Your issues may be one of them or not listed! However, we recommend trying some DIY (Do it yourself) fixes that may resolve your issue.

• Turn off background iCloud/iTunes sync to save battery by a considerable amount.
• When not in use turn off WiFi/Cellular Data/Location/Bluetooth service in your iPhone
• Don’t overcharge/ Frequently charge your iPhone 6. It may reduce battery health.
• Adjust your brightness settings in iPhone 6 to auto-brightness.
• Turn off Background app refresh
• From here: Settings > general > Background app refresh
• Try running it on low power mode
• from here: Settings > Battery > Low power mode ON
• Turn off “reduce motion” to turn off aesthetic animations in your phone to save battery life might help 
• Turn it off from here: Settings > General > Accessibility > Reduce Motion

If none of the aforementioned procedures work to resolve your battery draining issues, it may need to be looked at by a professional technician to get them resolved. Here at ifixit bd, we have dedicated and experienced technicians who have special expertise in repairing iPhones. Our experienced technicians are located in ifixit bd service points located in 4 different points in Dhaka, Bangladesh. We care about your phone and understand its importance. That’s why we offer quick service for your ease of access. We also offer a 30-days service warranty on applicable services provided by us.