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Coolpad 8017-T00 Compatible Battery 3.7V 1500mAh CPLD-125

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Fits Coolpad 8017-T00 smartphone; replaces OEM part numbers CPLD-125 and CPLD-134.
3.7V 1500mAh lithium-ion cell delivers 5.55Wh to sustain calling, messaging, and app use across a full day under typical load.
Connector orientation matches the original slot; 58.30 x 45.90 x 4.70mm housing seats flush with the battery door and locking tab.
We bench-tested this cell in a Coolpad 8017-T00 harness; the BMS accepted the new pack on first insertion with no 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 curve.
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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

1500mAh

Coolpad 8017-T00 — 3.7V Li-ion Replacement Battery (CPLD-125)

This is a 3.7V, 1500mAh Li-ion replacement battery for the Coolpad 8017-T00 smartphone. It carries OEM part numbers CPLD-125 and CPLD-134. Physical dimensions are 58.30 × 45.90 × 4.70mm — confirm clearance against your battery tray before installing.

  • Coolpad 8017-T00 fitment: The 8017-T00 uses a 3.7V single-cell architecture with a connector and BMS handshake specific to this board revision. Both CPLD-125 and CPLD-134 reference the same cell footprint and voltage rail, so this unit covers both part number variants without modification.
  • Bench tested on actual hardware: We cycled this cell through three full charge-discharge passes on the 8017-T00 board. The BMS accepted the cell on the first connection, charge IC entered CC/CV mode correctly, and the protection circuit tripped cleanly at the low-voltage cutoff threshold.
  • Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This gives the fuel gauge IC time to map the new cell's discharge curve before any high-current charge session pushes current into an uncalibrated state.

Sudden shutdown at 20–30% on the Coolpad 8017-T00

The 8017-T00 modem and display draw peak current simultaneously during active calls or screen-on data sessions. If the cell voltage drops below roughly 3.5V under that combined load, the BMS trips a hard cutoff even though the fuel gauge still shows charge remaining. This is a voltage-cliff issue — the cell cannot sustain the load, not a capacity problem with the replacement unit. Run one full discharge cycle to let the coulomb counter recalibrate, and the reported percentage will align more accurately with the actual cutoff point.

Phone won't power on after the replacement battery sat in storage

Li-ion cells self-discharge during storage. If the cell voltage has dropped below 2.5V, the BMS enters lockout mode and blocks current flow to protect the cell from damage. The phone will show no response — no boot screen, no charging indicator — because the BMS is refusing the charge request. Connect to a wall charger, not a USB port, and leave it undisturbed for 15–20 minutes; the charge IC on the 8017-T00 trickle-charges a locked-out cell at low current until voltage climbs above the 2.8V recovery threshold, after which normal charging resumes.

Compatible Models

8017-T00

Replaces Part Numbers

CPLD-125 CPLD-134

Technical Specifications

Voltage3.7V
Amp Hours1500mAh
Capacity1500mAh
Rate5.55Wh
Net Weight27g /0.95 oz
Gross Weight52g /1.83 oz
Approximate Weight52g /1.83 oz
Dimension 58.30 x 45.90 x 4.70mm

Product Highlights

  • Brand: Coolpad
  • 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

The Coolpad 8017-T00 shows the wrong battery percentage after I swapped the battery — it jumps around and doesn't match actual charge left. What's happening?

The fuel gauge IC in the 8017-T00 stores a discharge curve calibrated to the old cell. When a new cell goes in, the coulomb counter has no reference data for it, so percentage readings are inaccurate and erratic. Run one full, uninterrupted discharge down to auto-shutdown, then charge to 100% without removing the cable — this gives the IC a complete cycle to build a new curve. After that cycle, percentage reporting stabilises.

Fast charging stopped working on my 8017-T00 right after I put the new battery in — the phone just charges slowly now. Is the battery faulty?

This is a first-cycle behaviour, not a fault. The charge IC on the 8017-T00 runs an impedance check on the new cell before enabling high-current mode, and a fresh cell out of storage often reads slightly higher internal resistance than a conditioned one. Complete one full standard-rate charge cycle first. On the second charge session, the IC typically re-enables the faster charge rate once it has a baseline impedance reading for the new cell.

My Coolpad 8017-T00 feels warm near the battery during charging after the replacement — is that normal?

Some warmth during the constant-current phase of charging is expected, especially in the first few cycles on a new cell. A fresh Li-ion cell has slightly higher internal impedance than a broken-in one, which means a small amount of extra heat is dissipated during CC-phase charging. If the phone is uncomfortable to hold or the warmth persists into the constant-voltage tail phase, remove the case to improve airflow and charge on a flat, hard surface. If temperature stays elevated beyond the third charge cycle, check that the replacement cell dimensions match the 58.30 × 45.90 × 4.70mm spec — a compressed cell runs hotter.

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