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EB505165YZ Samsung Stratosphere i405 Replacement Battery 3.7V 1500mAh

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From $28.99 USD $35.99
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Fits Samsung Stratosphere i405 and replaces OEM battery EB505165YZ and EB505165YZBS variants.
3.7V at 1500mAh capacity restores full power to the Stratosphere's processor, display, and cellular modem.
Connector slides straight into the battery slot with a single locking tab at the base.
We ran this cell through a full discharge cycle on the i405 — BMS initialized cleanly with no early cutoff.
On first use after installation, run one complete discharge-charge cycle without opening other apps — the fuel gauge IC needs to recalibrate against this cell's discharge curve before heavy screen or modem load.
Delivery time

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

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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
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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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

1500mAh

Samsung Stratosphere i405 / SCH-i405 — 3.7V Li-ion Replacement Battery (EB505165YZ)

This 3.7V, 1500mAh Li-ion cell replaces the original EB505165YZ battery in the Samsung Stratosphere i405 and SCH-i405 QWERTY slider smartphone on Verizon's network. It also fits the Stratosphere 4G and SCH-i405U variants that share the same battery bay dimensions and connector. Voltage and chemistry match OEM spec exactly.

  • Stratosphere i405 and SCH-i405U platform fit: These variants share a common battery bay at 64.40 × 50.90 × 5.00mm with the same three-contact connector. The BMS communication protocol is identical across the lineup, so one cell covers both the base i405 and the 4G-labeled units without modification.
  • Bench tested on actual hardware: We cycled this cell in an SCH-i405 chassis and confirmed BMS handshake on first insertion. The protection circuit held charge-termination voltage at 4.20V and triggered low-voltage cutoff cleanly before cell voltage dropped below 3.0V under load.
  • Fuel gauge recalibration on first install: After fitting this cell, run one complete discharge-to-charge cycle with fast charging disabled. The Stratosphere's fuel gauge IC was calibrated against the old cell's discharge curve — skipping this step causes the percentage counter to jump erratically during the first few days of use.

Why the Stratosphere i405 reports wrong battery percentage after a cell swap

The i405 uses a coulomb-counting fuel gauge IC that tracks charge by measuring current flow in and out of the original cell. When a new cell goes in, the IC still holds the old cell's learned discharge curve in memory. The reported percentage drifts because the new cell's internal resistance profile doesn't match what the IC expects. One full discharge-then-charge cycle without interruption forces the IC to relearn the curve against the new cell's actual characteristics and restores accurate reporting.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under the combined load of the LTE radio, display, and processor — a voltage cliff the fuel gauge didn't predict because it hasn't recalibrated yet. The BMS reads the voltage drop as a fault and cuts power before the displayed percentage reaches zero. It is not a defective cell. Let the phone cool for two minutes, reboot, and allow a full uninterrupted charge to 4.20V before using it under heavy load again.

Compatible Models

Stratosphere i405 SCH-i405 Stratosphere 4G SCH-i405U Aegis Galaxy Metrix 4G

Replaces Part Numbers

EB505165YZ EB505165YZBSTD EB505165YZBS

Technical Specifications

Voltage3.7V
Amp Hours1500mAh
Capacity1500mAh
Rate5.55Wh
Net Weight35g /1.23 oz
Gross Weight60g /2.12 oz
Approximate Weight60g /2.12 oz
Dimension 64.40 x 50.90 x 5.00mm

Product Highlights

  • Brand: Samsung
  • 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 Stratosphere i405 won't turn on at all after the replacement battery sat in a drawer for months — is the cell dead?

Probably not dead, but the BMS has locked out below its minimum recovery threshold, typically around 2.5V per cell. Connect the phone to a wall charger — not a USB port — and leave it for 20–30 minutes without pressing the power button. The charge IC needs time to trickle current into the cell before the BMS will unlock and allow normal charging to resume. If the charge LED doesn't light within 40 minutes, try a different OEM-spec charger rated at 5V/1A.

The OS percentage is jumping around — showing 60%, then suddenly 45%, then back to 55% within minutes of each other.

This is the fuel gauge IC recalibrating against the new cell's discharge curve after a swap. The coulomb counter accumulated error against the old cell and now the readings are unstable until it maps the new cell. Run one complete, uninterrupted discharge from 100% down until the phone shuts itself off, then charge straight to full without unplugging mid-cycle. After that single full cycle the percentage reporting stabilises.

The phone feels warm near the battery compartment while charging — is the new cell faulty?

A new Li-ion cell has slightly higher internal impedance than a broken-in cell, so the charge IC pushes current into more resistance and generates more heat during the first few charge cycles. This is normal and tapers off after three to five full cycles as the cell's impedance settles. If the back of the phone becomes too hot to hold comfortably, stop charging and check that the charger output is 5V/1A — anything higher stresses the charge IC on this model. Heat that persists beyond five cycles warrants checking the charger, not the cell.

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