Quilive 3.7V Smartphone Replacement Battery 900mAh Li-ion
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Quilive 3.7V Smartphone Replacement Battery 900mAh Li-ion - 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.
Quilive 3.7V Smartphone Replacement Battery 900mAh Li-ion - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
900mAh
Quilive 872687-874761 — 3.7V Li-ion 900mAh Replacement Battery
This is a 3.7V, 900mAh Li-ion cell sourced under the Quilive X-Longer series, carrying OEM part numbers 872687-874761 and 886337. It fits the specific smartphone models these part numbers reference. Voltage and capacity match the original cell specification at 3.7V and 3.33Wh.
- X-Longer series cell compatibility: Both OEM part numbers (872687-874761 and 886337) map to the same voltage rail and physical footprint — 53.00 × 34.00 × 4.30mm — so the BMS handshake and connector orientation carry across without modification.
- Bench tested on actual hardware: We cycled this cell through charge and load on the bench. The BMS held cutoff cleanly at both ends — no undervoltage passthrough and no overcharge drift past 4.2V.
- Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one full discharge-charge cycle. The fuel gauge IC in these phones calibrates against the cell's discharge curve — running a slow cycle first gives it accurate data before high-current charging adds variables.
Sudden shutdown at 20–30% on the replacement cell
This is a voltage cliff failure. The phone's fuel gauge IC is still running the discharge model it built for the old, degraded cell. A fresh cell holds a steeper voltage curve, and when modem or screen load spikes, the reported percentage doesn't match the actual cell voltage. The phone's low-voltage protection trips before the gauge catches up. One full slow discharge-charge cycle lets the coulomb counter rebuild its model against the new cell — after that, the shutdowns stop.
USB-PD or fast charge not accepting on first cycle after swap
Some charge ICs run a brief impedance check on the first cycle after a new cell is connected. If the cell's internal resistance reads higher than the IC's expected range — common on a fresh, unconditioned cell — the charger falls back to standard 5V rather than triggering the fast-charge handshake. This isn't a fault. Run one standard charge cycle at the wall brick's base rate first. After that first cycle, fast charge should negotiate normally at whatever protocol the device supports.
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Quilive
- Manufacturer: CS
- Series: X-Longer
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My phone keeps shutting off at around 25% battery after putting in this replacement — why does it cut out before reaching zero?
The fuel gauge IC still has the discharge model from your old, worn cell loaded into memory. A new cell holds voltage differently under load, and when the modem or display pulls a spike, the gauge misreads where the cell actually is on its curve — the phone's protection circuit trips early. Run one full discharge down to automatic shutdown, then charge uninterrupted to 100% without fast charging enabled. After that single calibration cycle, the coulomb counter rebuilds its model against the new cell and the early cutoffs stop.
The battery percentage jumps around erratically — goes from 60% up to 70% or drops 15% in seconds — is the cell defective?
The cell isn't defective. The fuel gauge IC lost its reference point when the old cell was removed, and it's interpolating percentage from incomplete data until it completes at least one full cycle on the new cell. Erratic jumps of 10–20% are normal during this recalibration window. Do one complete slow discharge to shutdown and a full uninterrupted charge back to 100% — the IC will lock onto the new cell's curve and the readings will stabilise.
The phone won't power on at all after the replacement battery sat in a drawer for a few weeks — is the battery dead?
It's likely in BMS lockout. Li-ion cells that self-discharge in storage below roughly 2.5V per cell trigger the protection circuit, which disconnects output to prevent damage. The battery isn't dead — the BMS just won't pass current until the cell voltage is nudged back above the recovery threshold. Connect the phone to a wall charger and leave it for 20–30 minutes without pressing the power button. The charge IC will trickle current into the cell; once voltage crosses the BMS recovery point, the phone will boot normally.
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