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ZTE U950 Li-Polymer Compatible Battery 3.7V 2000mAh

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From $23.99 USD $29.99
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Fits ZTE U950, V955, U960S3, N880G and replaces OEM part Li3720T42P3h585651.
3.7V nominal, 2000mAh capacity delivers the original discharge curve your phone's fuel gauge expects.
Connector matches the stock ZTE contact layout with no adapter needed for direct swap.
We cycled the pack on a ZTE U950 bench unit; BMS accepted charge without fault codes.
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's discharge curve.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

3.7V

Amp

2000mAh

ZTE U950 / V955 / U960S3 — 3.7V Li-Polymer Replacement Battery (Li3720T42P3h585651)

This is a 3.7V, 2000mAh Li-Polymer cell built to the Li3720T42P3h585651 specification. It fits the ZTE U950, V955, U960S3, and N880G, among others in the same platform family. The cell measures 57 × 54 × 4mm — match your original before installation.

  • U950 / V955 platform fit: These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. One cell covers the full group without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the U950 platform. The BMS accepted the cell, charge termination triggered correctly at 4.2V, and the protection circuit held cutoff at the expected low-voltage threshold without tripping prematurely.
  • Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one full discharge-charge cycle. The fuel gauge IC is calibrated to the old cell's discharge curve. Running one slow cycle lets it recalibrate against the new cell before high-current charging pushes current into an uncalibrated state.

Sudden shutdown at 20–30% on the ZTE U950 after a cell swap

The U950's fuel gauge IC stores a learned discharge curve from the original cell. When a new cell goes in, that curve no longer matches the actual voltage drop under load. The modem and display draw a combined spike that causes the cell voltage to dip below the BMS cutoff threshold even while the OS still reports 20–30% remaining. The phone interprets this as a hard fault and shuts down. One full slow discharge-charge cycle forces the coulomb counter to relearn the new cell's actual capacity curve and corrects the shutdown behaviour.

Phone shows wrong battery percentage after replacement

The OS percentage display is driven by the fuel gauge IC, not a direct voltage reading. After a cell swap, the IC is still mapping charge state against the old cell's impedance and self-discharge profile. This causes percentage figures to jump, stall, or freeze at values like 99% or drop suddenly. Drain the phone until it shuts off, then charge uninterrupted to 100% on a standard 5V charger — this resets the coulomb counter and re-anchors the gauge to the new cell's actual endpoints.

Compatible Models

U950 V955 U960S3 N880G Grand X Pro Blade Super

Replaces Part Numbers

Li3720T42P3h585651

Technical Specifications

Voltage3.7V
Amp Hours2000mAh
Capacity2000mAh
Rate7.4Wh
Net Weight30.3g /1.07 oz
Gross Weight55g /1.94 oz
Approximate Weight55g /1.94 oz
Dimension 57.00 x 54.00 x 4.00mm

Product Highlights

  • Brand: ZTE
  • 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 ZTE U950 won't turn on at all after the replacement battery sat in a drawer for months — is the cell dead?

It's likely a BMS lockout. Li-Polymer cells that drop below roughly 2.5V per cell in storage trigger a protection circuit that blocks current flow entirely to prevent thermal runaway. The phone won't respond to the power button or show a charging indicator. Connect it to a 5V wall charger — not a PC USB port — and leave it for 20–30 minutes without pressing anything. The BMS needs a trickle current to recover voltage above the lockout threshold before normal charging can resume.

Fast charging stopped working on my ZTE U950 the first time I plugged in the new battery — was it working before?

Yes, this is a known first-cycle behaviour. The USB charging negotiation protocol on the U950 depends partly on the BMS recognising the cell as fully initialised. On the first connection, some replacement cells present a slightly higher internal impedance, and the charge IC defaults to standard 5V current rather than negotiating the higher rate. Run one full standard-rate charge cycle to completion. On the second cycle, fast charging typically resumes once the BMS and charge IC have exchanged a complete handshake at the new cell's impedance level.

My ZTE U950 feels warm near the battery area while charging the new cell — is that normal?

A new Li-Polymer cell has slightly higher internal impedance than a broken-in cell, which generates more heat during the initial charge cycles as the charge IC pushes current against that resistance. This typically reduces after two or three full cycles as the cell's impedance settles. If the device stays warm well into the constant-voltage phase — past roughly 4.1V — or gets uncomfortably hot to hold, stop charging and check that the connector is fully seated, as a partial connection increases resistance at the contact point.

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