AP21A8T Laptop Battery Replacement for Acer Predator Helios 300 PH317-56-78LY PH317-56-78SM PH315-55-78L7 PH315-55-796N Nitro 5 AN517-55-78KU/713K Series AP21A7T AP21A5T 15.4V 90.61Wh 5716mAh

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Lithium-ion batteries, rechargeable batteries for portable electronics,100% new from Manufacturer. Adopt strict quality control standards, reliable and high-quality batteries. Meet the OEMs specifications, be stable and last long, Lower Power Consumption, provide stronger power for your laptop.

ModelAP21A8T Battery
TypeLi-ion
Voltage15.4V
Capacity90.61Wh 5716mAh
Condition : 100% New from Manufacturer, Grade A Cell
Packing Included:

1* AP21A8T battery
1* Instruction manual
Meet the OEM. CE / FCC / RoHS certified.
Easy to install.
Up to 1000+ recharge cycles over the life of the battery.
Easily deal with various practical environments and bring you a stronger battery life experience.
Method 1: Use System Information to find your laptop model

Step 1: Press " Windows + R " to open the Run window.
Step 2: Type " 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 2: Open the back cover of the laptop and confirm the battery type and capacity, as well as the model of the laptop.

Step 1: Turn off the laptop and unplug the power cord (to prevent electric shock)
Step 2: Remove the back panel with a screwdriver. (Please proceed with care to avoid damage to the laptop's components.)
Step 3: Disconnect the cable connected to the battery and remove it. After that, you can check the specifications of your battery.
Replacement Part Number:

AP21A8T AP21A7T AP21A5T KT0040G014
Compatible Models: (use "Ctrl+F" to find your model quickly)

Fit for Acer Nitro 5 AN517-55 Series
Fit for Acer Predator Helios 18 PH18-71 Series
Fit for Acer Predator Helios 300 PH315-55 Series
Fit for Acer Predator Helios 300 PH317-56 Series
Note: For more accrate, please check the part number of your original battery.
Manual calibration, The steps are:
1) Shut down, plug in the power adapter to fully charge the battery. If the battery is full, you can proceed directly to the next step.
2) Unplug the power adapter, turn on the battery, and let the battery automatically discharge until the computer automatically shuts down. During this period, it is best not to do any computer operations.
3) Plug in the battery adapter and fully charge the battery. This process is OK if it is turned on or not.
To borrow software, such as batteryMon :
1) Install the battery, plug in the power adapter, and power on. Run Batterymon and click the start button. After charging, shut down and unplug the adapter.
2) Restart and run Batterymon. Close all applications, adjust the power plan to turn off the screen for 1 minute and never go to sleep, and then slowly wait for the battery to discharge until it automatically shuts down. Repeat the operation 3 times.
3) The software is still used, but the battery manager on the official website is used, just follow the instructions.
Besides, The software is still used, but the battery manager on the official website is used, just follow the instructions.
Use the battery that comes with BIOS to calibrate:
(1) After booting, quickly press the "F2" key to enter the BIOS menu; use the left and right direction keys to select and enter the Power menu.
(2) Enter the Power menu, you can see the "Start Battery Calibration" option, select it and press the Enter key to execute.
(3) At this time, the screen will turn blue, and there will be a prompt in English, requiring that the notebook's power adapter be plugged in to charge the battery. After the battery is fully charged, the screen prompts the user to disconnect