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ZTE Blade A910 Li-Polymer Replacement Battery 3.85V 2500mAh

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From $25.99 USD $31.99
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Fits ZTE Blade A910 and Blade A910 Dual SIM, replaces OEM battery Li3925T44P8h786035.
3.85V and 2500mAh rated capacity restores full charge cycles to the original specification.
Connector is a two-pin spring contact on the board side, no locking tab required.
Bench test showed clean voltage ramp on first insertion, BMS accepted charge without fault codes.
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 discharge curve before high-current charging stresses an uncalibrated cell.
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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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

2500mAh

ZTE Blade A910 Series — 3.85V Li-Polymer Replacement Battery (Li3925T44P8h786035)

This 3.85V, 2500mAh (9.63Wh) Li-Polymer cell replaces the original battery in the ZTE Blade A910, Blade A910 Dual, and Blade A910 Dual SIM smartphones. It matches the OEM part number Li3925T44P8h786035 and fits the physical cavity at 76.80 x 59.60 x 3.20mm. Use this when the original cell no longer holds charge through a normal day of calls, messaging, and app use.

  • Blade A910 platform fit: The A910, A910 Dual, and A910 Dual SIM all share the same battery bay dimensions, connector pinout, and BMS handshake — one cell covers the full variant range without modification.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Blade A910 unit. The BMS accepted the cell without fault flags, the charge IC reached full termination voltage correctly, and the protection circuit tripped at the expected over-discharge threshold.
  • 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 build an accurate discharge curve for the new cell before high-current charging begins. Skipping this step is the main reason users see erratic percentage readings in the first few days.

Why the Blade A910 reports wrong battery percentage after a cell swap

The Blade A910 uses a coulomb counter and stored discharge curve to estimate remaining charge. When you install a new cell, the fuel gauge IC is still calibrated to the old, degraded cell's curve. The result is that the percentage display may jump, stall, or plateau at values that do not reflect actual charge state. One full discharge to auto-off followed by an uninterrupted charge to 100% resets the reference points and brings the displayed percentage back in line with real capacity.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem radio, screen, or a background app pulls a current spike the cell cannot sustain without voltage dropping below the BMS cutoff threshold — even though the gauge still shows charge remaining. It is a calibration gap, not a faulty cell. The protection circuit cuts power at roughly 3.0V per cell to prevent damage, and the OS interprets that as a shutdown. Run the full recalibration cycle described above; after one complete discharge-charge pass, the gauge tracks the actual voltage curve and the shutdowns stop.

Compatible Models

Blade A910 Blade A910 Dual Blade A910 Dual SIM BA910 Blade V770 WiMAX 2+ ZTU31 Z861BL Z862VL Blade A512 BV0701 ZFive L ZFive L LTE Zfive 2017 Blade Z10 Blade Z10 Dual SIM LTE

Replaces Part Numbers

Li3925T44P8h786035

Technical Specifications

Voltage3.85V
Amp Hours2500mAh
Capacity2500mAh
Rate9.63Wh
Net Weight36g /1.27 oz
Gross Weight71g /2.50 oz
Approximate Weight71g /2.50 oz
Dimension 76.80 x 59.60 x 3.20mm

Product Highlights

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

Frequently Asked Questions

The Blade A910 won't power on at all after the new battery sat in a drawer for a few months — is it dead?

The BMS locks the cell out when voltage drops below approximately 2.5V during storage, which prevents charging through normal means. Plug in the original ZTE charger and leave it connected for 20–30 minutes without pressing the power button — the charge IC trickle-charges the cell back above the BMS unlock threshold before switching to normal charge current. If the charging indicator appears within that window, the cell is recovering normally; if nothing appears after 45 minutes, check the connector seating inside the phone.

Fast charging stopped working after I swapped the battery — the phone just charges slowly now.

On the first cycle after installation, the USB charge controller on the Blade A910 may not negotiate the faster charge profile with an uncalibrated cell — it defaults to standard 5V current as a safety measure. Complete one full slow charge to 100%, then discharge the phone to auto-off, and reconnect the charger. After that initial cycle, the charge IC recognises the cell's impedance profile and the faster charge negotiation resumes normally.

The battery percentage jumps erratically — it reads 45%, then skips to 60%, then drops to 30% within minutes.

The fuel gauge IC is using the old cell's stored discharge curve as its reference, so voltage readings from the new cell map to the wrong percentage values. This is not a hardware fault. Discharge the phone completely until it shuts itself off, then charge it uninterrupted to 100% with the screen off. That single full cycle rewrites the coulomb counter's baseline and the percentage display stabilises at the correct values.

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