Check to see how many apps you have running as this can quickly drain your battery.
Go to SETTINGS > DEVICE > BATTERY for a list of which apps use how much battery. You may need to adjust app settings to compensate.
You can use the “Recent Apps” Menu to close your apps. Making this a common habit will greatly increase your battery usage.
You can expect your NUU Smartphone to get you through the work day with moderate to heavy usage.