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LG Stylo 5 BL-T44 Replacement Battery 3.85V 3400mAh

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From $26.99 USD $33.99
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Fits LG Stylo 5 smartphones replacing OEM battery part number BL-T44.
3.85V and 3400mAh capacity sustains the phone through a full day of calls, messaging, and app use.
Connector seats flat against the phone's battery contact pins with a single mechanical locking tab on the right edge.
We cycled this Li-Polymer cell on a Stylo 5 test unit — BMS accepted charge current without fault codes and held voltage under modem load.
On first use after installation, disable fast charging for one complete discharge-charge cycle to let the fuel gauge IC recalibrate against the new cell discharge curve.
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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

3.85V

Amp

3400mAh

LG Stylo 5 — 3.85V Li-Polymer Replacement Battery (BL-T44)

This 3.85V, 3400mAh Li-Polymer battery replaces OEM part BL-T44 in the LG Stylo 5 and its carrier variants including LMQ720PS, LMQ720CS, and LMQ720MS. It fits the same physical footprint as the factory cell at 93.04 × 43.42 × 4.50mm. Install it when the original cell no longer holds a charge or causes unexpected shutdowns.

  • Carrier variant compatibility: The LMQ720 series spans Sprint, Verizon, Metro, and T-Mobile hardware. All share the same battery bay dimensions, connector pinout, and BMS handshake protocol — this cell works across all those variants without modification.
  • Bench tested on actual hardware: We ran this cell on a Stylo 5 unit through full charge and load cycles. The BMS accepted the charge profile without error, the protection circuit triggered correctly at low-voltage cutoff, and the fuel gauge IC initialised without flags on boot.
  • First-cycle fast charge behaviour: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Why the Stylo 5 reports wrong battery percentage after a cell swap

The Stylo 5 uses a coulomb-counter fuel gauge IC that builds its charge model against the original cell's impedance and discharge curve over time. When a new cell goes in, the IC still references the old model. This causes the reported percentage to lag behind or jump ahead of actual charge state. One full discharge to automatic shutdown followed by an uninterrupted charge to 100% forces the IC to resample against the new cell and correct its internal table.

Sudden shutdown at 20–30% on the replacement cell

This is a voltage cliff, not a capacity problem. Under peak modem or screen load, the new cell briefly drops below the BMS cutoff threshold — typically around 3.2V — even though the reported percentage still shows charge remaining. The fuel gauge IC has not yet mapped where the cell's voltage collapses under load. Run two full discharge-charge cycles without fast charging. After recalibration, the IC anticipates the voltage drop earlier and the OS shuts down closer to 0% rather than 25%.

Compatible Models

Stylo 5 LMQ720PS LMQ720CS LMQ720MS LM-X520 Q60 X525EAW LMQ720QM5 LMQ720QM6 Q720MS LMQ720TSW Q720TS LMQ720QM Q720QM LMQ720AM Q720A L722DL Q720P LMQ720VSP Q720V Q720 LMQ720TS3 Stylo 5x Q720CS Stylo 5+ Stylo 5 Plus Q720DL LM-Q720PS Q720PS Stylo 5 LM-Q720TS Stylo 5 LM-Q720CS Stylo 5 LM-Q720PS Stylo 5 LM-Q720VS Stylo 5 LM-Q720MS Premier Pro Plus LM-L455DL Stylo 5 L722DL Stylo 5 Q720TSW Q720VSP Stylo 5 LM-Q720QM6 LM-Q720QM5 Stylo 5x LMQ720TS3 Stylo 5x LMQ720 LG720TABB Stylo 5+ Plus LM-Q720AM Stylo 5+ Plus LM-Q720QM Q60 LM-X525WA Q60 LM-X525HA K50 LM-X520HM Stylo 5 Q720

Replaces Part Numbers

BL-T44 EAC64518701 EAC64538301

Technical Specifications

Voltage3.85V
Amp Hours3400mAh
Capacity3400mAh
Rate13.09Wh
Net Weight46.2g /1.63 oz
Gross Weight81g /2.86 oz
Approximate Weight81g /2.86 oz
Dimension 93.04 x 43.42 x 4.50mm

Product Highlights

  • Brand: LG
  • 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

The Stylo 5 won't turn on at all after the replacement battery sat in a drawer for a few months — is the cell dead?

It is likely not dead — the BMS has locked out below 2.5V per cell after deep discharge in storage. Connect the phone to a wall charger using the original cable and leave it for at least 30 minutes without pressing the power button. The charge IC will trickle current into the cell until it clears the BMS lockout threshold, then the device will boot normally. If nothing happens after 45 minutes, try a different wall adapter rated at 5V/1A minimum.

Fast charging stopped working after I swapped the battery — it only charges slowly now

The USB-PD or Qualcomm Quick Charge handshake between the charger and the phone's charge IC can fail to negotiate on the first cycle with a new cell, defaulting to standard 5V charging. This is a protocol reset issue, not a fault with the battery. Fully discharge the phone to automatic shutdown, then charge it uninterrupted to 100% using the same fast charger. On the second cycle the charge IC re-establishes the high-current handshake and fast charging resumes at the correct rate.

The phone feels warm near the battery for the first hour of charging after the swap — is something wrong?

A new Li-Polymer cell has higher internal impedance than a broken-in cell, so the charge IC pushes voltage against more resistance in early cycles and generates more heat. This is normal for the first two to three charge cycles and settles as the cell's impedance drops. Keep the phone out of its case during those first cycles to let heat dissipate freely. If the back of the phone exceeds uncomfortable-to-touch heat after the third cycle, check that the battery connector is fully seated and flat — a partially engaged connector increases contact resistance.

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