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BM4Y Battery for Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh | 4520mAh | Welzone
BM4Y battery for Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh is made for buyers who need the right part without guesswork. Yes, the BM4Y is the correct replacement battery for Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh. It has the original 4520mAh capacity, built-in overcharge protection, and a 6-month warranty. Ships across India after order confirmation.
BM4Y battery for Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh is listed by Welzone with model-specific fitment details, useful buying checks and clear installation guidance so customers can confirm the part before ordering.
Why Your Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh Battery Wears Out
Every phone battery has a life of around 300 to 500 charge cycles. After that, it starts holding less and less charge. So if your Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh used to last a full day and now it barely makes it to the afternoon — the battery is the reason, not the phone. Replacing it is the simplest and cheapest fix.
About the BM4Y Battery
The BM4Y is a 3.85V Li-Polymer battery with 4520mAh capacity and 17.4Wh energy rating — built around the listed device specification battery that came inside your Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh. It fits into the same slot without any cutting or modification. The built-in protection chip stops charging automatically when the battery is full, so you never have to worry about overcharging.
How to Get It Installed
If you have never opened a phone before, we suggest going to a local mobile repair shop. They will do it quickly for around a small service fee. If you are comfortable doing it yourself, watch a teardown video for your exact Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh model on YouTube before you start. The pry tool and spudger included in the box are the only tools you need.
Warranty
Every BM4Y battery comes with a 6-month replacement warranty. If it stops working normally because of a manufacturing issue — like losing charge too fast without any damage — we replace it. Contact Welzone support with your order ID and a short video. We process claims within 3 working days.
Delivery
Dispatch timing depends on order time, stock and courier pickup. Delivery time depends on your pincode and courier route. You will get updates on SMS, email, and WhatsApp. Cash on Delivery may be available on eligible pin codes.
Welzone Fit Note for Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh
This Battery page is built from the listed part number BM4Y, product category and visible store data. Before ordering, match the model number in your phone settings or on the old part label. If a phone family has multiple variants, add the exact compatible models and specifications manually in the Welzone Layout tab.
Package Includes
- 1x BM4Y Battery (4520mAh) for Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh
- 1x Plastic Opening Tool
- 1x Spudger
- 1x Welzone Thank You Card 🙏
Yes. The BM4Y is made specifically for the Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh. It fits the original battery slot without any cutting or modification. Please check your phone's model number before ordering to confirm compatibility.
The BM4Y has a capacity of 4520mAh at 3.85V — the same as the original battery that came with your Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh. You get the same battery life as a brand new phone.
With normal daily use, the BM4Y battery lasts a full day on a single charge for most Xiaomi Poco F3 I Redmi K40 I Redmi K40 Pro I Redmi K40 Pro+ 4520mAh users. Heavy users like gamers or those who watch a lot of video may need to charge once during the day.
Yes. Every BM4Y battery from Welzone comes with a 6-month replacement warranty. If the battery has a manufacturing defect, we replace it. Contact Welzone support with your order ID and a video showing the issue.
If you have opened a phone before, yes. The box includes a plastic pry tool and spudger. If this is your first time, we suggest visiting a local repair shop — most charge a small service fee and finish quickly.
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