A:Answer About 5-6 hours right now. Look at using an app called "throttlestop" by Undervolt, it will help manage your power use and also the laptop temperature. If you find your laptop running hot, use XTU (Extreme Tuning Utility), it's a free app that will help determine if your CPU is indeed running hot (90+ celsius range). Dell has a great fix for this, they needed to redo the thermal paste and replace the thermal pipe. Hope this helps!