Lenovo — My laptop battery backup is very bad.

Address:

SAHU CHOWK ROYAL ENFIELD SHOWROOM SITANARHI BIHAR 843302

Dear sir,
I bought lenovo 14' inch laptop on April 5th 2021, after some days i found that this product has not a good battery backup as i expect, i am totally disappinted from this product please resolve my issue as soon as possible.

Here is my product details:-

Model name-81vv(lenovo ideaPad S340-14IIL U)
BUYER NAME-SHAHZAD ALAM
MOB NO-[protected]
Product serial number: MP1Y5SQD