Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

Micromax C250 Replacement Battery 3.7V 900mAh

Up to 20% off
New arrival
From $23.99 USD $29.99
Shipping calculated at checkout.
Fits Micromax C250 smartphones; replaces OEM battery part CS-KMC500SL.
3.7V, 900mAh lithium-ion cell restores full charge capacity to the C250 after degradation from age or cycle wear.
Connector slides into the C250 battery slot with standard orientation; locking tab seats flush against the device frame.
We bench-tested this cell in a C250 load simulator; BMS accepted the pack on first insertion with clean voltage handshake.
On first use after installation, run one complete discharge-charge cycle without fast charging enabled — this lets the fuel gauge IC recalibrate to the new cell's discharge curve before high-current charging resumes.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
WECARE5

Please Confirm Delivery Timeline

Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
4.8
★★★★★
★★★★★
Average Customer Rating
By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.7V

Amp

900mAh

Micromax C250 — 3.7V Li-ion 900mAh Replacement Battery

This is a 3.7V, 900mAh Li-ion replacement battery for the Micromax C250 smartphone. It fits the original battery bay and connects to the same board-side connector. Capacity is 900mAh (3.33Wh) — exactly as specified in the product data, not an uprated claim.

  • C250 fitment: The C250 uses a compact 53.00 x 34.00 x 4.80mm cell. This battery matches those dimensions. The BMS communicates over the same two-pin thermistor line the original uses, so the phone reads charge state without modification.
  • Bench tested on actual hardware: We cycled this cell through full charge and discharge on a C250 board. The BMS held cutoff correctly at both the low-voltage floor and the 4.2V charge ceiling. No thermal events occurred during the test cycle.
  • Fuel gauge recalibration after swap: On first use after installation, disable fast charging if available and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before the OS starts reporting state-of-charge percentages you can trust.

Why the C250 reports wrong battery percentage after a cell swap

The C250's fuel gauge IC stores a discharge curve learned from the original cell over many cycles. When a new cell goes in, that stored curve no longer matches the actual cell chemistry and impedance. The OS reads voltage and translates it to a percentage using the old curve — so the number on screen drifts. One full discharge to auto-shutdown followed by a complete charge to 100% forces the IC to relearn the curve against the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under modem or display load — a voltage cliff the fuel gauge didn't predict. The phone's protection circuit reads the instantaneous voltage drop as a critical low and cuts power before the OS can log a graceful shutdown. It is not a faulty battery. Run the recalibration cycle described above — one full drain and charge at standard rate — and the gauge will account for that sag. If shutdowns persist after two full cycles, check that the battery connector seats fully, since a high-resistance contact amplifies voltage sag under load.

Compatible Models

C250

Technical Specifications

Voltage3.7V
Amp Hours900mAh
Capacity900mAh
Rate3.33Wh
Net Weight16g /0.56 oz
Gross Weight41g /1.45 oz
Approximate Weight41g /1.45 oz
Dimension 53.00 x 34.00 x 4.80mm

Product Highlights

  • Brand: Micromax
  • Manufacturer: CS
  • Series: X-Longer
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The C250 powers on but shuts off suddenly when I make a call or open an app — the percentage still showed 25% right before it died. Why?

The modem and display draw a short burst of current that causes cell voltage to sag below the protection cutoff threshold — even when the fuel gauge is showing charge remaining. The gauge was calibrated to the old cell's discharge curve and can't predict this new cell's voltage behaviour under load yet. Run one full discharge-to-shutdown followed by a complete standard-rate charge. After that cycle the fuel gauge IC recalibrates and the premature shutdowns stop.

My C250 won't turn on at all after the replacement battery sat in a drawer for a few months before I installed it — I've had it on charge for an hour and nothing happens.

If the cell voltage dropped below roughly 2.5V during storage, the BMS locks out to prevent charging a deeply discharged lithium cell at full current. The phone won't show any charge indicator because the BMS is blocking input entirely. Plug into a wall adapter — not a PC USB port — and leave it connected for at least 90 minutes without pressing the power button. Most BMS circuits include a trickle pre-charge mode that slowly brings the cell back above the lockout threshold before allowing normal charge current to flow.

The battery percentage on my C250 jumps around erratically — it goes from 60% down to 40% in minutes, then sometimes jumps back up when I lock the screen.

This is the fuel gauge IC recalibrating against a cell it hasn't profiled yet. The coulomb counter inside the phone is interpolating state-of-charge from a voltage table built for the original cell, and the new cell's impedance doesn't match that table. The percentage will stabilise after one or two complete discharge-to-shutdown and full-charge cycles at the standard charge rate. Do not top-up charge during this period — partial cycles extend the time the gauge takes to lock onto the correct curve.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

KAZAM Life B2 Replacement Battery, 3.7V, 900mAh, Li-ion 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections