Smartphone Battery BM4Y 420mAh/17.1WH for Xiaomi Poco F3 Redmi K40 Pro K40 Pro

Warranty

1-Year Warranty
All our high quality replacement batteries for Xiaomi BM4Y come with a 1-year warranty. Warranty is applicable if the buyer has installed the battery properly in the device and has treated the battery correctly.
30-Day Money Back Guarantee
Our goal is to turn customer satisfaction into ‘Complete Customer Satisfaction’. That's why we offer you a 30-day money back guarantee, on top of our warranty and RMA procedure for defects!
Please note: in order to qualify to get your money back, you must first contact us and await instructions before sending back your product.
Returns
If you have a problem with one battery which bought from us, please contact us first. We will process your request and try to find a solution for your problem. If the problem cannot be fixed by our technical support engineer, we will generate an RMA number (Return Material Authorization) for you. If inspection concludes that the returned battery is defective, a new battery will be shipped out without extra charge.

FAQs

Q: How to check this battery is compatible with my laptop?

A: Please find out your old battery's part number or the exact model name of your laptop at first (like 'Xiaomi BM4Y'), then to match our product compatibility chart. Second please compare your old battery to our product images ensure their shape is same. Finally check the voltage(Rating) is same to your old battery's.

Q: Does your replacement Xiaomi BM4Y battery compatibles with my original Xiaomi BM4Y battery?

A: 100% OEM compatible, guaranteed to meet the specifications of your original Xiaomi Poco F3 Redmi K40 Pro K40 Pro battery (ensue same size & high quality). And all our batteries for Xiaomi BM4Y have obtained international certification( CE, UL, ROHS, ISO9001/9002 ).

Q: How to charge a new battery for Xiaomi BM4Y for the first time use?

A: New Xiaomi BM4Y battery pack is normally shipped in its partially charged condition. Please cycle your new Xiaomi BM4Y battery pack by fully charge and discharge it for 3-5 times to allow it to reach its maximum rated capacity before use. (Note: it is perfectly normal for a battery to become warm to the touch during charging and discharging).
New batteries are hard for your device to charge; they have never been fully charged and are therefore "unformed". Sometimes your device's charger will stop charging a new battery before it is fully charged. If this happens, simply remove the battery from your device and then re-insert it. The charge cycle should begin again. This may happen several times during your first battery charge. Don't worry; it's perfectly normal.

Q: How to Remove Replace Install and Upgrade your Xiaomi BM4Y Smartphone Battery?

A: 1. Turn yourXiaomi BM4Y laptop over.
2. Find the laptop battery release button lock for your Xiaomi BM4Y laptop.
3. Now that your Xiaomi BM4Y Smartphone Battery is unlocked, find the battery release button down.
4. Holding the Smartphone Battery release button, gently pull your battery away from the laptop.
5. Now that your Xiaomi BM4Y battery is removed, grab your replacement Xiaomi BM4Y battery for installation.
6. Insert the battery into the slot. Push the Xiaomi BM4Y battery towards the laptop and secure it in place.

Q: How To Extend Your Xiaomi BM4Y Battery Life

1. When using a laptop, you can dim the screen. By far the biggest power drain on most laptops is the screen.
2. Don't leave your Asus laptop battery on the permanent charge.It is not advantageous to charge the original Smartphone Battery BM4Y for a long time.
3. By default, your laptop might be set to Windows’ ‘Balanced’ setting rather than Power Saver,you can customize a power plan by clicking Change plan settings next to a profile.