WY9DX Laptop Battery 42Wh 3-Cell - Replacement for Dell Latitude 14 5420 15 5520 Precision 15 3560 Series P137G P137G001 P104F P104F001 P104F002 1K2CF 01K2CF 0M3KCN 075X16 WK3F1 005R42 11.4V 3500mAh

1, You need to turn off your laptop and disconnect the power.
2, 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.
3, 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.
4, 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.
1. Discharge the new battery use to 10%(not to 0%) and then charge to 95%, and cycle 3-4 times.
2. Do not disassemble, crush or puncture. Do not dispose of in fire or water.
3. If you remove the battery for a long time, charge more than 80% at least one time within one month.
4. Don't connect the adapter for a long time while using the battery. It may damage the battery.
5. When using the battery, care should be taken to prevent exposure and moisture.
1. Could be caused by battery loss. Please re-install the battery and make sure that the battery cable and the motherboard interface are tightly inserted.
2. Maybe due to conductive material damage which the laptop motherboard and battery anode and cathode contact position, you can try to confirm it with your original battery.
3. Check whether the battery drive is in normal condition, if not, download the corresponding driver software to update.
1.Turn off the laptop.
2.Unplug AC power.
3.Remove the battery.
4.Replace AC power.
5.Turn on laptop,allow OS to boot.
6.Once logged in to the machine,perform a normal shut donw.
7.Unplug AC power.
8.Replace battery.
1, Change your laptop power plan settings, and choose the power saver plan. Then Change advanced power settings, and scroll down to find Processor power management. Click the On-battery option and reduce the processor state to 20%.
2, Always keep your laptop neat and clean. The dust easily enters the hardware through the vents which are meant to release the heat generated from various computer components.
3, Close Wi-Fi, Bluetooth, and other settings. This can help your computer save precious battery life.
Compatible Part NumberWY9DX RJ40G 01K2CF 075X16 0WK3F1 0M3KCN 005R42Compatible ModelReplacement for Dell Latitude 14 5420 Series: Dell Latitude 14 5420 CHKFM; Dell Latitude 14 5420 FDTCY; Dell Latitude 14 5420 XPC5HCompatible ModelReplacement for Dell Latitude 15 5520 Series: Dell Latitude 15 5520 39V1H; Dell Latitude 15 5520 FPKNMCompatible ModelReplacement for Dell Precision 15 3560 Series:Dell Precision 15 3560 3H45Y; Dell Precision 15 3560 4MTF7; Dell Precision 15 3560 758J7; Dell Precision 15 3560 7RV10; Dell Precision 15 3560 F3T9TCompatible ModelReplacement for Dell P137G P137G001, Dell P104F P104F001 P104F002NoteThe Dell laptop models on this product page are compatible with 2 battery models:WY9DX (42Wh 3-Cell) , RJ40G(63Wh 4-Cell).Please open the back cover of your laptop to check the original battery size and capacity before placing an order. Please scroll down to the list to purchase.AttentionIf the laptop fails to detect the battery or the battery level cannot be displayed correctly after battery installation, please check whether the battery cable is properly connected. Improper cable fixation may result in the battery's inability to charge. What do I need to be aware of when I receive a battery?
You need to check its appearance, confirm the model, read the instruction manual. Cycle and charge it 5 to 6 times to activate the maximum usage space of the battery. When not in use temporarily, charge the battery to 50%-60%.

What should I do if laptop won't boot up after installing a new battery?
1.Check if the battery is properly seated and connections are clean. 2.Try charging it or use the adapter alone to start. 3.Examine h