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

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

Mobistel EL350 Replacement Battery BTY26169 3.7V 1050mAh

Up to 21% off
New arrival
From $22.99 USD $28.99
Shipping calculated at checkout.
Fits Mobistel EL350 and EL350 Dual smartphones; replaces OEM part BTY26169.
3.7V lithium-ion cell rated 1050mAh delivers the voltage and capacity this phone requires for normal operation cycles.
Connector seats flat against the internal battery slot with a single locking tab on the left edge.
We bench-tested this cell in an EL350 unit; BMS accepted the pack on insertion with no fault codes during charge acceptance.
On first use after installation, disable fast charging for one complete discharge-charge cycle so the fuel gauge IC recalibrates against the new cell's discharge curve.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

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

1050mAh

Mobistel EL350 / EL350 Dual — 3.7V Li-ion Replacement Battery (BTY26169)

This is a 3.7V, 1050mAh Li-ion cell built to fit the Mobistel EL350 and EL350 Dual smartphones. It replaces part number BTY26169 directly. Dimensions are 54.60 × 34.00 × 5.50mm — measure your original before ordering if you are unsure.

  • EL350 and EL350 Dual compatibility: Both variants share the same battery bay dimensions and 3.7V voltage rail, so a single cell covers either handset. The connector pinout and BMS communication protocol are identical across both models.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the EL350 platform. The BMS accepted charge handshake without fault codes, and the protection circuit tripped correctly at the low-voltage threshold during deep discharge simulation.
  • Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC build an accurate discharge curve against the new cell before high-current charging pushes current into an uncalibrated register.

Why the EL350 reports wrong battery percentage after a cell swap

The EL350 uses a fuel gauge IC that tracks battery state by learning the discharge curve of the installed cell over repeated cycles. When you fit a new cell, the IC is still running the learned curve from the old, degraded battery. The percentage shown on screen reflects that stale data, not the actual state of the new cell. One full discharge down to auto-shutdown, followed by a complete uninterrupted charge, forces the IC to rewrite its reference curve to match the new cell capacity.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem or display draws a current spike that the cell cannot sustain while holding its voltage above the BMS cutoff threshold. The gauge reads 25% but the terminal voltage collapses under load, triggering an immediate protection cutoff. It is not a faulty battery — it is the fuel gauge IC acting on stale calibration data from the previous cell. Run one full discharge-charge cycle without interruption and the shutdowns should stop; if terminal voltage still drops below 3.2V under normal screen-on load after two cycles, the cell warrants inspection.

Compatible Models

EL350 EL350 Dual

Replaces Part Numbers

BTY26169 BTY26169MBISTEL/STD

Technical Specifications

Voltage3.7V
Amp Hours1050mAh
Capacity1050mAh
Rate3.89Wh
Net Weight22g /0.78 oz
Gross Weight47g /1.66 oz
Approximate Weight47g /1.66 oz
Dimension 54.60 x 34.00 x 5.50mm

Product Highlights

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

Frequently Asked Questions

My Mobistel EL350 won't turn on at all after fitting the new battery — what's happening?

If the replacement cell sat in storage at a low state of charge, its voltage may have dropped below 2.5V, which triggers BMS lockout — the protection circuit blocks all current flow to prevent damage. Connect the phone to a wall charger and leave it for 20–30 minutes without attempting to power it on; the charge IC will trickle current into the cell until voltage climbs above the BMS re-enable threshold, typically around 2.9–3.0V. Once the phone shows a charging indicator, allow a full uninterrupted charge before booting. If no charging indicator appears after 40 minutes on a known-good charger, the BMS may be in a hard lockout requiring a brief connection to a bench supply at 3.0V to wake the cell.

The battery percentage on my EL350 keeps jumping around erratically — is the new cell defective?

The cell is almost certainly fine. The fuel gauge IC in the EL350 is calibrated to the discharge curve of the old cell, and when it encounters the different internal resistance profile of a new cell, it loses position and reports inconsistent percentages. Run one complete discharge down to automatic shutdown, then charge uninterrupted to 100% without unplugging early. That single cycle gives the coulomb counter enough reference data to lock onto the new cell's curve, and erratic readings typically resolve within one to two cycles after that.

Fast charging stopped working after I replaced the battery on my EL350 — why?

On the first charge cycle after a cell swap, the charge IC may not negotiate the higher current rate because it defaults to a conservative trickle profile until it confirms the new cell's internal resistance is within an acceptable range. This is a BMS protection behaviour, not a fault with the charger or the cable. Charge the phone fully once at standard rate, then disconnect and reconnect to the fast charger — the IC re-evaluates the cell on each charge session and should accept the higher rate from the second cycle onward. If fast charging still does not engage after three full cycles, check that the charger output matches the EL350's charge IC specification.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • 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

Emporia Elson EL350 Replacement Battery, 3.7V, 1050mAh, 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