Coco Chen 39LT/39LX/39LI secondary Li-ion battery

Rechargeable Lithium‑Ion Polymer (Li‑Po) battery — commonly used as an internal power source in smartphones.

Specifications

• Model Codes

  39LT, 39LX, 39LI

  Battery Type

  Rechargeable Lithium‑ion Polymer (Li‑Po)

  Capacity

  ≈ 4000 mAh — rated capacity for these models (nominal)  

  Typical Energy

  ~15.4 Wh‑ish (4000 mAh × ~3.85 V nominal)

  Nominal Voltage

  ~3.85 V (standard for single‑cell Li‑Po smartphone batteries)

  Chemistry

  Lithium‑ion Polymer (Li‑Po)

  Protection

  Built‑in protective circuits (over‑charge, over‑discharge, short‑circuit) — typical of smartphone replacement batteries

  Certifications

  Often CE, RoHS, FCC on replacement versions (varies by supplier)

  Form Factor

  Internal battery (not user‑removable) — flat pouch cell installed inside the phone

  Installation

  Requires phone disassembly by a technician or experienced DIYer