Don't worry! Our express to the United States is DHL, and it only takes 14 days to sign.
Specification:

Battery Model: L15C2P31

Capacity: 8500MAH/32.3WH

Voltage: 3.8V

Battery Type: Li-ion

Cell: 3 cells Made in China, high quality guarantee

Color: Black

Condition: 100% Brand New(1-year warranty!)

Replace Part Number:

L15C2P31 1ICP4/86/103-2 SB18C04740

Compatible Laptop Model:

For Lenovo Yoga Book YB1-X91F

For Lenovo Yoga Book YB1-X91L

For Lenovo Yoga Book YB1-X91X

For Lenovo Yoga Book YB1-X90F

For Lenovo Yoga Book YB1-X90F (ZA0V)

For Lenovo Yoga Book YB1-X90L (ZA0W)

For Lenovo Yoga Book YB1-X91F (ZA15)

For Lenovo Yoga Book YB1-X91L (ZA16)

About Shipment:
(1)ltems are usually shipped out within 3-5 business days after payment was confirmed.(Sat. & Sun. excluded.) (2) All items will be shipped out via POST MAIL, such as CHINA POST HOLAND POST or other special line Mail. Each order will have a tracking number to track the shipping status. (3) Please make sure to provide complete and right address including full name,address detail, phone number , zip code , so that the post office can delivered package to you efficiently and successfully. (4) We are not responsible for buyer import custom duties and related taxes.
You can check your express shipping status with this:
https://www.17track.net/en

About Delivery Time (1) ltems ship from China,it normally takes 20-30 working days to arrive. But the delivery time depends on weather,holiday,locally shipping situation and customs clearance factors in destination country.

Five Star response

Please give us the 5 stars positive response if you satisfy with our product and service.

If you unsatisfy or have meet any problem, please contact KingSener team for help ,

we happy to professional warranty service and solution