ZTE T84/Telstra Tough Max - Manual (Page 7)

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• If the battery is deeply discharged it can take 30 minutes to start
charging. Leave it on charge to recover the battery.
• Keep your handset and battery cool. High temperatures degrade the
battery more quickly.
• Normal charge time is 3-4 hours. Do not charge more than 24hrs.
• When not using the phone for long periods charge to approx 40% and
remove the battery.
• With low network signal conditions battery life is reduced.
• Turn off Bluetooth and Wi-Fi when not in use, and set the screen
brightness to automatic to maximise battery life.