MI BM4U Battery for Redmi K30 Ultra – 4500mAh

Brand: MT Star, Quality Beyond Comparison

MT Star BM4U battery for the Redmi K30 Ultra. 4500mAh, Li-ion polymer, certified to IS 16046 for safe everyday use.

About this Product

The Redmi K30 Ultra pushes its battery hard with a 120Hz display and a flagship-class chipset. The MT Star BM4U is a 4500mAh replacement built for that load, bringing back the screen-on time an older cell has lost.

MI BM4U battery specifications

Battery model	BM4U
Compatible phones	Redmi K30 Ultra
Capacity	4500mAh typical / 4400mAh rated
Nominal voltage	3.87V
Charge voltage limit	4.45V
Battery type	Rechargeable lithium-ion polymer
Certification	BIS IS 16046 (Part 2): 2018 and IEC 62133-2: 2017 (R-41280119)
Series	MT Star Premium Series

Signs your Redmi K30 Ultra needs a new battery

The phone only works while plugged into the charger
Charging takes far longer than it did when the phone was new
The battery drains much faster than it used to
The phone shuts down suddenly at 10-30% charge

Why choose MT Star

Safety comes first with MT Star. Our batteries are certified to IS 16046 and IEC 62133-2, built to the original dimensions, and backed by our support team and easy returns for manufacturing defects.

BIS certified
Original size & connector
Easy returns

Frequently asked questions

Which battery does the Redmi K30 Ultra use?

The Redmi K30 Ultra uses the BM4U battery. The MT Star BM4U is a direct replacement for it.

What is the battery capacity of the Redmi K30 Ultra?

This replacement BM4U battery has a capacity of 4500mAh, matching the Redmi K30 Ultra’s original battery.

Is the MT Star BM4U battery safe?

Yes. It’s certified under BIS IS 16046 (Part 2): 2018 and IEC 62133-2: 2017 (R-41280119) and is made to the original size and connector.

Should a technician install this battery?

Yes. We recommend having it fitted by a trained mobile repair technician, because modern phones have glued backs and delicate connectors.

How should I charge a new replacement battery?

Use a good-quality charger suited to your phone. After fitting, charge it fully and use it normally for the first few cycles so the battery indicator calibrates.

Can I buy MT Star batteries in bulk?

Yes. MT Star supplies distributors and repair shops across India. Contact us to become a distributor.