A31N1519 Laptop Battery for Asus F540LA-XX059 X540UP K540LA F540MB F540MA R540MB R540MAA540LA-XX016 R540UB R540UV K540NA D540SY K540UB D540DA F540LA-XX030T X540LA-XX772 X540LJ-XX044T X540LJ-XX015T

Specifications: Battery Type:Li-ion Voltage:11.25V Label Capacity:2600mAh Product Type:Replacement Battery Condition : Brand New, 'A' grade cells,100% OEM Compatible! Package includes: 1x Battery ---------------------------------------------------- Warm tips(Very important!!!): (1)Before purchase, please confirm that your laptop model or battery part number compatible with in our title; (2) if laptop model or battery part number in our title,please make a comparison between your original battery and our item,whether it is the same appearance(especially the connector location);if they are all same,and then you can buy it,thanks (3)if you are still not sure,you can contact us,and we will give you advice in time. How to check your laptop model? Method 1:You can check your laptop model on the label of back of your laptop Method 2: Use System Information to find your laptop model Step 1: Press Windows + R to open Run window. Step 2: Input "msinfo32" in the empty box and click OK to open System Information. Step 3: Keep in the System Summary section, and you will find the System Model item in the right pane. Method 3: Remove Battery from Laptop to find your laptop battery part number Step 1: Switch off the laptop and unplug the power cable in case of electric shock Step 2: Remove the back panel with the screwdriver. You should to this with care avoiding any harm to the laptop components. Step 3: Disconnect the cable connected to the battery and then take out the battery. After that, you can check the specifications of your battery. ------------------------------------------------------------- Install A New Battery: You need to turn off your laptop and disconnect the power. Disconnect the connection between the old battery and the motherboard to avoid unnecessary damage caused by disassembling the battery. Then unscrew the old battery screws one by one and carefully save each screw. Remove the old battery, carefully install the new battery on the battery case, screw in the screw, and connect the wiring of the new battery. If you don't understand the above steps, you can search for the video about laptop battery installation on YouTube. Maybe it will help you. Laptop Battery Instructions: Discharge the new battery to 10% (not 0%), then charge(100%) and cycle 3-5 times to wake up the new battery. It can calibrate the state of the battery by performing a complete and effective charging and discharging of the battery once a month. Charge it to around 50% when you store it long term. Do not keep your battery below 5% or deep discharge state (long time 0%), may turn on battery protection and cause the battery to fail to charge. Please feel welcomed to notify us of any inconvenience or fault in our battery. The following are troubleshooting methods: Turn off the laptop. Unplug AC power. Remove the battery. Replace AC power. Turn on laptop,allow OS to boot. Once logged into the machine, perform a normal shut down. Unplug AC power. Replace battery.