Search "mi 10i battery model name" and you arrive at the BM4W battery model name, the cell Xiaomi fitted to the India Mi 10i 5G. Listings also give it to the Redmi Note 9 Pro 5G sold in China and the Mi 10T Lite 5G sold in Europe, all versions of one design.
Xiaomi advertised 4820 mAh for these phones. Many replacement sellers print 4600 mAh at 3.85 V, about 17.7 Wh. That gap is larger than the usual rated versus typical difference, so read the label and choose a pack closest to the original.
Quick facts
One design, three names, one BM4W battery model name
| Phone | Main market |
|---|---|
| Mi 10i 5G | India |
| Redmi Note 9 Pro 5G | China |
| Mi 10T Lite 5G | Europe |
The India Redmi Note 9 Pro is a different 4G phone with BN53; do not mix them up.
4820 versus 4600 mAh
Xiaomi's figure is 4820 mAh. Sellers in Europe and the US commonly list 4600 mAh with 17.71 Wh, and a few print 4820. Either the 4600 figure is an aftermarket cell with less capacity, or it is a rated value Xiaomi set unusually low. Without an official label photo, assume a 4600 mAh replacement holds a little less than the original and prefer a pack sold by Xiaomi service if full life matters to you.
Confirming BM4W in your Mi 10i
The About phone screen shows Mi 10i; the model code begins M2007J17. The battery sits under a glass back, so opening needs heat and care. The sticker should read BM4W with voltage and capacity lines.
Mi 10i owners sometimes notice the glass back lifting near the camera bump. That is often a swollen BM4W cell. Unplug the phone and get it checked before the next charge.
Battery life on the Mi 10i
The Mi 10i pairs a 120 Hz LCD with a mid-range 5G chip, and a healthy BM4W covers a day of mixed use. At 33 W it charges fully in a little over an hour. On an ageing Mi 10i, dropping the panel to 60 Hz buys back a useful chunk of screen time.
BM4W among Xiaomi's BM packs
Mi-branded phones and a handful of Redmi models carry BM codes. BM4Y and BM5R are other BM packs on this site. Only the full four characters identify a pack; BM4W and BM4Y, for instance, are different cells. See the Xiaomi family index.
Replacing it
A Xiaomi service centre can fit a genuine BM4W by model number. If you go elsewhere, ask the shop which capacity their pack prints and choose the one nearest 4820 mAh. After fitting, run the phone through a full charge and a full day before judging the result.
Mi 10i or Mi 10T Lite: does it matter
The Mi 10i sold in India and the Mi 10T Lite sold in Europe are close relatives with the same BM4W pack in listings, though cameras and some radios differ. If you imported a Mi 10T Lite, a pack bought for the Mi 10i should fit. Still compare the old and new labels, because some regional batches use different cell suppliers whose packs vary slightly in thickness.
The 108 MP camera bump on the Mi 10i makes the glass back curve near the top. A swelling cell lifts that area first, which is why repairers check there.
Frequently asked questions
What is the Mi 10i battery model name?
BM4W, shared with the Redmi Note 9 Pro 5G and Mi 10T Lite 5G.
What is the BM4W capacity?
Xiaomi advertised 4820 mAh. Many replacements print 4600 mAh at 3.85 V.
Is the Mi 10i battery the same as the India Redmi Note 9 Pro?
No. The India Redmi Note 9 Pro uses BN53. BM4W is for the 5G version sold in China.
How fast does the Mi 10i charge?
It supports 33 W, a little over an hour to full.
Is a 4600 mAh BM4W worth buying?
It will fit and work, but expect slightly shorter battery life than the original 4820 mAh pack. A Xiaomi service centre part is the safer choice if full endurance matters.