 Hello, this is Nick from Laptop Media and today we will show you how to open the Dell Latitude 15 3540. To open this laptop you have to undo 9 captive Philips head screws. Raise the bottom panel close to one of the top 2 corners to create a gap. After that you can pop the plate with a thin plastic tool starting from the sides. Then you can work your way around the front and the back. Please remember, it would be of great help to us if you just hit the like button and subscribe to our channel. That would motivate us to make even more and better videos for you. Our laptop has the optional 54 watt hour battery, the default version is a 42 watt hour variant. To remove it, pull out the connector from the motherboard and undo the 5 Philips head screws that fix the unit to the base. The optional capacity lasts for 9 hours and 5 minutes of web browsing or 8 hours and 20 minutes of video playback. To achieve that, you have to apply the balanced preset in the Windows power and battery menu and select the optimized power plan in the BIOS. You can rely on 2 so dims that fit up to 64GB of DDR4, 3200 MHz RAM in dual channel mode. Below the cooling fan is placed the single M.2 slot for 2280 or 2230 Gen 4 SSDs. Below the NVMe there are two small thermal pads. The cooling system has a single fan, one heat pipe, a heat sink and a heat spreader.