Pantech Burst PBR-51A Replacement Battery 3.7V 1300mAh
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Pantech Burst PBR-51A Replacement Battery 3.7V 1300mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
Pantech Burst PBR-51A Replacement Battery 3.7V 1300mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
1300mAh
Pantech Burst P9070 — 3.7V Li-ion Replacement Battery (PBR-51A)
This is a 3.7V, 1300mAh Li-ion cell for the Pantech Burst (P9070) smartphone. It replaces OEM part PBR-51A and fits directly into the battery bay with the original connector alignment. Capacity is rated at 4.81Wh — matching the factory specification for this handset.
- Burst and P9070 compatibility: Both model designations refer to the same handset on the AT&T network. The battery compartment, connector pin layout, and BMS handshake are identical across both. One cell covers both listings.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the Burst platform. The BMS communicated correctly with the phone's charge IC, and the protection circuit tripped at the expected low-voltage cutoff without requiring a manual reset.
- Fuel gauge recalibration on first use: On first use after installation, disable any fast-charge mode and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before high-current charging is applied to an uncalibrated cell.
Sudden shutdown at 20–30% on the Pantech Burst after a cell swap
The Burst's fuel gauge IC retains the discharge curve from the old, degraded cell. When a new cell is installed, the IC's stored curve no longer matches the actual voltage slope of the fresh cell. Under modem transmit load or screen-on draw, voltage drops faster than the IC predicts, and the phone shuts down well above 0%. One full discharge-to-charge cycle forces the coulomb counter to re-learn the new cell's behaviour and clears the mismatch.
Pantech Burst won't power on after sitting in storage with a flat battery
Li-ion cells that drop below approximately 2.5V trigger a BMS lockout to prevent cell damage. The phone shows no response because the protection circuit blocks current flow until the cell voltage recovers to the recovery threshold. Connect the device to a wall charger — not a PC USB port — and leave it for 15–20 minutes without pressing the power button. Once the cell climbs above the BMS recovery floor, typically around 2.9–3.0V, the phone will resume normal charging and boot.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Pantech
- 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 Pantech Burst shuts off at around 25% battery after I put in a new cell — what's causing that?
The fuel gauge IC on the Burst was calibrated to the old cell's discharge curve, and the new cell has a different voltage slope under load. When the modem or screen draws current, voltage sags faster than the IC expects, and it triggers a shutdown before the cell is actually empty. Run one full discharge down to automatic power-off, then charge uninterrupted to 100% — this resets the coulomb counter against the new cell.
The battery percentage on my Burst is jumping around erratically after the replacement — is the new battery faulty?
The percentage jumping is almost always the fuel gauge IC recalibrating, not a defective cell. The IC's stored charge model still reflects the old battery, so it misreads state-of-charge until it has fresh data. Let the phone run down to auto-shutdown and charge back to full without interruption — after one or two complete cycles the readings stabilise. If the jumping continues past three full cycles, check that the battery connector is fully seated and making clean contact on all pins.
Fast charging stopped working after I replaced the battery in my Pantech Burst — is something wrong with the charge port?
The charge IC on the Burst can decline the high-current charge profile on the first cycle with a new cell because the BMS reports an uncalibrated or cold state. This is a protective behaviour, not a port fault. Charge the phone once at standard current — using a basic 5V/1A wall adapter — through a complete cycle. On subsequent charges, the IC re-evaluates the cell state and the higher charge rate is typically accepted again.
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