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Pharos M619 PZX95 Replacement Battery 3.7V 1400mAh

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From $24.99 USD $30.99
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Fits Pharos M619, Mercury 619, Traveler 619 models; replaces OEM part numbers PZX95 and A83TA000F.
3.7V nominal, 1400mAh capacity delivers 5.18Wh — enough for standard call and messaging cycles on this mid-range smartphone.
Li-ion cell slides into the rear battery slot with flat connector orientation; locking tab seats flush against the housing edge.
We bench-tested the BMS handshake on a Mercury 619 unit — fuel gauge IC initialized correctly and accepted charge pulses without cutoff errors.
On first use after installation, disable fast charging for one complete discharge-charge cycle so the fuel gauge IC recalibrates against this 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.

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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.

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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

3.7V

Amp

1400mAh

Pharos M619 / Mercury 619 / Traveler 619 — 3.7V Li-ion Replacement Battery (PZX95)

This is a 3.7V, 1400mAh Li-ion cell that fits the Pharos M619, Mercury 619, and Traveler 619 smartphones. It replaces OEM part numbers PZX95 and A83TA000F. The cell matches the original's physical footprint at 70.50 × 58.00 × 4.50mm and uses the same connector pinout.

  • M619 / Mercury 619 / Traveler 619 platform fit: These models share the same battery bay dimensions, connector layout, and charge IC interface. One cell covers the full range — no adapter or modification needed.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the M619 platform. The BMS accepted the charge IC handshake without error flags, and voltage held stable across screen-on and modem-active load states.
  • 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 map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.

Sudden shutdown at 20–30% on the replacement cell

The M619's fuel gauge IC stores a discharge curve calibrated to the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The phone reads 25% remaining, but the cell's real voltage under modem load drops below the cutoff threshold — so the device shuts down. Running one full discharge down to automatic power-off, then charging uninterrupted to 100%, forces the coulomb counter to reset against the new cell's actual curve. After that cycle, the percentage readings track correctly.

Device will not power on after sitting in storage

Li-ion cells self-discharge in storage. If the M619 has been unused for several months, the cell voltage may have dropped below 2.5V — the point where the BMS locks out to prevent damage. The phone appears completely dead and does not respond to the power button. Connect the device to a wall charger, not a USB port, and leave it for 20–30 minutes without attempting to power it on. The charge IC applies a low-current trickle to bring the cell back above the BMS re-enable threshold, typically around 2.9V, before normal charging resumes.

Compatible Models

M619 Mercury 619 Traveler 619 Traveler M619 PTL619 PTL619BN

Replaces Part Numbers

PZX95 A83TA000F

Technical Specifications

Voltage3.7V
Amp Hours1400mAh
Capacity1400mAh
Rate5.18Wh
Net Weight34g /1.20 oz
Gross Weight59g /2.08 oz
Approximate Weight59g /2.08 oz
Dimension 70.50 x 58.00 x 4.50mm

Product Highlights

  • Brand: Pharos
  • 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

The Pharos M619 keeps shutting off at around 25% battery — why does this happen with a new cell?

The fuel gauge IC on the M619 is still running a discharge curve calibrated to the old, degraded cell. When the new cell's voltage drops under modem or screen load, the phone's cutoff logic fires earlier than the displayed percentage suggests. Run one full discharge to automatic shutdown, then charge to 100% without interruption. After that single calibration cycle, the shutdowns stop.

Fast charging stopped working after I replaced the battery on my M619 — what's happening?

On the first cycle after a cell swap, the charge IC sometimes does not negotiate the fast-charge protocol with the new BMS until it completes one standard charge. This is normal behaviour — the IC runs a compatibility check on the first pass. Charge the phone once at standard rate to 100%, then disconnect and reconnect. Fast charging should engage on the second cycle.

The battery percentage on my Pharos M619 is jumping around erratically after replacement — is the cell faulty?

The cell is not faulty — the coulomb counter inside the fuel gauge IC is recalibrating against the new cell's discharge profile. It takes one full discharge-charge cycle for the counter to lock onto accurate capacity data. Let the phone drain to auto power-off, then charge to 100% in one uninterrupted session. Percentage readings stabilise after that cycle completes.

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