Sale!
BM5J 5000mAh 3.87V Li-ion Polymer replacement battery for Redmi K50 Ultra 22081212C, front view showing battery surface and small 2-pin connector
BM5J 5000mAh 3.87V replacement battery for Redmi K50 Ultra 22081212C, back view showing model number BM5J, capacity 5000mAh, and voltage 3.87V on spec label

BM5J 5000mAh 3.87V Battery for Redmi K50 Ultra 22081212C Replacement

Original price was: $26.99.Current price is: $19.99.

🔘 BM5J 5000mAh 3.87V | 🔋 Li-ion Polymer | 📱 For Redmi K50 Ultra 22081212C 120W HyperCharge

8 in stock

No PayPal account? 💳 Pay with credit/debit card | 🛡️ PayPal Buyer Protected
SKU: BM5J Category: Tags: , , , , ,
📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ Why Our Warranty Stands Out

Unlike marketplace sellers with short buyer protection windows, we handle claims directly — no automated disputes, no endless back-and-forth.

Compare✅ Qingsm Tech⚠️ eBay / AliExpress
Warranty Period90 days from delivery15-30 days from order confirmation
When It Starts📦 Upon delivery⚠️ Upon order confirmation (even before you receive it)
Claims HandlingWe do it directly — email usAutomated dispute system, seller dependent
After Window ExpiresStill can contact us for supportNo recourse, seller can ignore you

🔋 90-day warranty is the industry standard for replacement batteries. Batteries naturally lose capacity over time — this normal wear is not covered. Warranty applies to manufacturing defects only.

📦 Shipping Cost & Delivery Time (Economy Shipping from China)

📦 Note: Batteries are classified as hazardous goods and must be shipped via specialized channels, which may take slightly longer than standard couriers. Delivery times are estimates and may be affected by customs, weather, or other unforeseen circumstances. If your country is not listed in the table below, we are currently unable to ship batteries to that destination.

DestinationFreight (USD)Est. Delivery Time
United States$7.808–15 days
Canada$6.8018–30 days
Mexico$10.0030–60 days
Germany, France, United Kingdom, Greece$6.5018–30 days
Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Hungary, Ireland, Italy, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland$8.0018–30 days
Croatia, Finland, Lithuania, Latvia, Slovenia$8.0030–50 days
Bulgaria, Romania$14.0030–50 days
South Korea, Japan, Australia, New Zealand, Israel, Malaysia, Singapore, Thailand, Philippines, Kazakhstan$7.5018–30 days
United Arab Emirates, Saudi Arabia, Vietnam, Chile, Peru, Colombia, Brazil$18.0025–60 days

🇧🇷 Note for Brazil: Brazilian customs can occasionally cause delays of up to 80 days or more. And please indicate the recipient's CPF, as it is required for Brazilian customs and shipping. Thanks! We appreciate your understanding.

🇪🇺 Note for EU countries: Due to new EU customs regulations effective July 1, 2026, a flat tariff fee of $4.00 (approx. €3.50) applies to shipments to EU countries. This fee covers customs tariff, handling, and payment processing costs, and will be added at checkout. Thank you for your understanding.

🔋 Can't find your battery model? Use our FREE Battery Lookup Service – tell us your device and we'll find a match within 24 hours. 👉 battery.qingsm.tech/find-my-battery

Description

✅ Condition: Brand New – Never used, factory-tested quality

✅ 5000mAh High Capacity – Restores full battery life for Redmi K50 Ultra

✅ CE / RoHS / UN38.3 Certified

✅ 90-Day Warranty from delivery – Longer coverage than major platforms

✅ Ships in 3-7 days with tracking

🛡️ Shipping Protection Available at Checkout

✅ PayPal Buyer Protection included

✅ 100% Compatibility Guarantee – If it doesn’t fit, we’ll refund you. No questions asked.

⚠️ Low Stock Alert: Only 8 left in stock. Order now to avoid waiting.

Battery model: BM5J
Capacity: 5000mAh / 19.3Wh
Rated voltage: 3.87V
Charge limit voltage: 4.45V
Battery type: Li-ion Polymer (Grade A cells)
Compatible with: Redmi K50 Ultra (22081212C)
Package include: 1 x battery
Revive your Redmi K50 Ultra with this BM5J 5000mAh replacement battery. Released in August 2022, the Redmi K50 Ultra is a flagship performance smartphone featuring a 6.67-inch 120Hz OLED display, Snapdragon 8+ Gen 1 processor, and the iconic 120W HyperCharge fast charging — capable of reaching 100% in just 19 minutes. The 5000mAh battery combined with 120W charging provides exceptional endurance and lightning-fast top-ups. After years of daily charging cycles, the original BM5J battery has likely degraded significantly. This Li-ion Polymer battery restores the full 5000mAh capacity, bringing back the reliable all-day battery life the K50 Ultra was known for. Built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE, RoHS, and UN38.3 certified.
Why This Battery Replacement Matters for Redmi K50 Ultra Users: The Redmi K50 Ultra was designed for power users who demand both endurance and speed. The 5000mAh battery originally provided approximately 1.28 days of typical use, with the 120W HyperCharge delivering a full charge in under 20 minutes — a combination that set new standards in the flagship segment. However, after years of charging cycles, the original battery’s capacity drops significantly. Common symptoms include: the phone needing multiple charges per day, shutting down at 15-25% battery remaining, slower charging than the original 120W speed, or the battery swelling. This replacement restores the original battery life and charging speed, saving you from buying a new phone. The BM5J battery is compatible with the phone’s 120W HyperCharge — reaching approximately 100% in 19 minutes with the original 120W charger and cable. The Snapdragon 8+ Gen 1 processor and 120Hz display demand stable power delivery, and a fresh BM5J battery ensures the phone delivers peak performance without throttling or unexpected shutdowns.
Compatibility Note: Fits Redmi K50 Ultra (22081212C) only. Please confirm your battery model before ordering — BM5J is printed on your original battery. This battery is also compatible with Xiaomi 12T and 12T Pro, which share the same BM5J battery design. This battery is NOT compatible with Redmi K50, Redmi K50 Pro, Redmi K50 Gaming Edition, or other Redmi models. The 22081212C is the standard Redmi K50 Ultra model; using a different battery model may cause charging issues or incorrect battery reporting.

Discover more from Battery.qingsm.tech

Subscribe to get the latest posts sent to your email.

Reviews

There are no reviews yet.

Be the first to review “BM5J 5000mAh 3.87V Battery for Redmi K50 Ultra 22081212C Replacement”

Your email address will not be published. Required fields are marked *
To receive the "Verified Owner" badge, please use the same email address you used when placing your order.

Frequently Asked Questions

The BM5J battery for Redmi K50 Ultra is compatible with Redmi K50 Ultra (model 22081212C). If you need a Redmi K50 Ultra battery replacement for 22081212C, this BM5J 5000mAh battery is the exact match. The Redmi K50 Ultra features a 6.67-inch 120Hz OLED display, Snapdragon 8+ Gen 1 processor, and 120W HyperCharge fast charging. For BM5J battery for Redmi K50 Ultra compatibility, please verify your device model in Settings > About Phone. This battery is also compatible with Xiaomi 12T and 12T Pro, which share the same BM5J battery. This battery is NOT compatible with Redmi K50, Redmi K50 Pro, Redmi K50 Gaming Edition, or other Redmi models. If your Redmi K50 Ultra battery drains quickly or won't hold a charge, this BM5J replacement battery will restore full performance.

The BM5J 5000mAh battery for Redmi K50 Ultra has a typical capacity of 5000mAh (19.3Wh) and a rated voltage of 3.87V, with a charge limit of 4.45V. This BM5J 3.87V 5000mAh Li-ion Polymer battery is built with grade A cells and is CE, RoHS, and UN38.3 certified. For Redmi K50 Ultra battery life after replacement, expect approximately 1.28 days of typical use and all-day heavy usage on a single charge. The Redmi K50 Ultra 5000mAh battery performance provides excellent endurance for gaming, video streaming, and daily tasks. Charging the Redmi K50 Ultra battery with the original 120W HyperCharge adapter takes approximately 19 minutes to 100% — one of the fastest charging speeds available. For best performance, allow 2-3 full charge cycles after installation to calibrate the battery meter. If your original battery now requires daily multiple charges or shuts down at 15-25% remaining, this replacement will restore the original battery life and 120W charging speed.

Professional Redmi K50 Ultra battery installation is recommended. The Redmi K50 Ultra has a sealed glass back with strong adhesive. To replace Redmi K50 Ultra battery 22081212C, the technician must heat the back cover to soften adhesive, carefully pry it open to avoid cracking the glass, disconnect the battery's small 2-pin connector, remove the old battery (lightly adhered), and install the new BM5J battery before resealing. The 6.67-inch OLED display is fragile, and improper prying can damage it. Third-party repair shops typically charge $20-35 for labor. Xiaomi official battery replacement costs vary by region. For Redmi K50 Ultra battery health maintenance: 1) Use only the original Xiaomi 120W HyperCharge charger and cable for optimal charging. 2) Keep battery level between 20% and 80% for daily use to maximize lifespan — the 5000mAh cell has plenty of capacity even within this range. 3) Avoid exposing the phone to high temperatures (above 40°C / 104°F), especially while using 120W fast charging. 4) For long-term storage (over 2 months), keep the battery at approximately 40-60% charge. 5) Perform a full calibration cycle after installation: drain the phone until it auto-shuts off, then charge uninterrupted to 100% using the original 120W charger. For Redmi K50 Ultra battery care tips, stop using immediately if the battery shows any swelling.

Related products

✅ Ready to order?

This battery is in stock and ready to ship within 3-7 days. 90-day warranty included.

👉 Add to Cart Now