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LR50 Motorola Moto Edge Replacement Battery 3.87V 3900mAh

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From $26.99 USD $33.99
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Fits Motorola Moto Edge, Moto Edge 5G; replaces OEM part LR50 and SB18C66911.
Voltage 3.87V, capacity 3900mAh — supplies full charge cycles to the modem, display, and radio without early shutoff.
Connector seats flat against the phone's battery slot with standard Li-Polymer contact alignment and mechanical locking tab.
We ran discharge cycles at 500mA and 1.5A load; BMS accepted the pack on first insertion with no fault delays.
On first full charge cycle after installation, disable fast charging — this lets the fuel gauge IC recalibrate to the new cell discharge curve before USB-PD pushes current into an uncalibrated cell.
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
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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.

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⚠️ 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

3.87V

Amp

3900mAh

Motorola Moto Edge / Moto Edge 5G — 3.87V Li-Polymer Replacement Battery (LR50)

This is a 3900mAh (15.09Wh) Li-Polymer cell built to replace the OEM LR50 battery in the Motorola Moto Edge and Moto Edge 5G. It fits XT2063-2 and XT2063-3 variants. Voltage runs at 3.87V nominal, matching the original cell spec exactly.

  • XT2063-2 and XT2063-3 compatibility: Both variants run on the same 3.87V power rail with the same flex connector and BMS handshake protocol. One cell covers both board revisions without modification.
  • Bench tested on actual hardware: We cycled this cell through a full charge and discharge on an XT2063-3 unit. The BMS accepted the cell without fault codes, and the charge IC stepped through trickle, CC, and CV phases cleanly.
  • Fuel gauge recalibration on first install: After fitting this cell, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.

Sudden shutdown at 20–30% on the Moto Edge after a cell swap

This happens when the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell hits a voltage cliff — typically around 3.5V under modem or screen load — faster than the IC expects, causing the OS to read 20–30% right before the phone shuts off. It is not a defective cell. One full discharge-charge cycle at standard rate lets the coulomb counter reset its endpoint and recalculate remaining capacity against the actual new cell behavior.

USB-PD fast charging not recognised on the first cycle after replacement

On the first cycle, the BMS on a fresh Li-Polymer cell may not immediately signal readiness for high-current input to the charge IC. The phone falls back to standard 5V charging until the cell voltage climbs above roughly 3.6V and the BMS handshake completes. Plug in, let it charge fully at standard rate once, then unplug and replug. Fast charging should activate normally from the second cycle onward.

Compatible Models

Moto Edge Moto Edge 5G XT2063-3 XT2063-2

Replaces Part Numbers

LR50 SB18C66911

Technical Specifications

Voltage3.87V
Amp Hours3900mAh
Capacity3900mAh
Rate15.09Wh
Net Weight51.2g /1.81 oz
Gross Weight76.2g /2.69 oz
Approximate Weight76.2g /2.69 oz
Dimension 67.68 x 58.60 x 5.15mm

Product Highlights

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

Frequently Asked Questions

My Moto Edge shuts off at around 25% after I replaced the battery — is the new cell faulty?

The cell is almost certainly fine. The fuel gauge IC on the XT2063 board is still using the discharge curve it mapped on the old, degraded cell, so it misjudges how much capacity is left on the new one. Run one full discharge down to automatic shutdown, then charge to 100% at standard rate without fast charging. After that cycle the coulomb counter recalibrates to the new cell and the shutdowns stop.

The phone gets noticeably warm near the battery during the first charge after fitting the LR50 replacement — should I be concerned?

Some warmth is expected on the first charge cycle. A fresh high-impedance Li-Polymer cell causes the charge IC to work slightly harder during the constant-current phase, which generates more heat than a broken-in cell would. If the temperature stays below uncomfortable-to-hold-against-skin level and drops after the first full cycle, it is normal. If it stays hot on the second and third charges, check that the adhesive backing on the cell is fully seated and not trapping heat against the mid-frame.

The battery percentage on my Moto Edge is jumping around erratically — goes from 60% down to 40% in minutes, then back up.

Erratic percentage jumps after a cell swap are a fuel gauge IC recalibration issue, not a hardware fault. The IC's stored charge table no longer matches the new cell's actual voltage-to-capacity curve, so small voltage dips under load get misread as large capacity drops. Force a full recalibration: use the phone normally until it shuts down on low battery, charge uninterrupted to 100% at standard rate, then repeat once more. After two full cycles the readings stabilise around ±3%.

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