Import 3.7v Lithium Ion Polymer Battery Pack — Buy in Bulk from Supplier in China

Joolee Battery (Shenzhen) Co., Ltd. supplies lithium-ion polymer (LiPo) battery packs with a nominal 3.7 V, using pouch-cell construction rather than the cylindrical format common to 18650 systems. The listing indicates a capacity span from 100 mAh to 50 Ah, a range that implies multiple cell sizes and potentially custom pack assembly rather than a single stock SKU. LiPo cells employ a polymer electrolyte in gel form within an aluminium-laminated flexible pouch, permitting thinner and lighter pack geometries than equivalent cylindrical designs.

The maximum charge voltage of 4.2 V aligns with standard cobalt-oxide and NMC pouch chemistries. Discharge cut-off is not specified in the source, but 3.0 V is typical for protection circuit settings to avoid copper anode dissolution and irreversible capacity loss. The wide capacity range suggests Joolee Battery assembles packs from single cells through to multi-parallel, multi-series configurations with PCM, NTC thermistor, and connector harnesses. The 50 Ah upper bound implies large-format cells or modular pack architecture for industrial or light electric vehicle applications.

Target buyers span consumer electronics OEMs seeking slim power solutions, medical device manufacturers requiring reliable portable power, and industrial integrators building custom energy storage. The polymer format suits wearable devices, drones, handheld instrumentation, and backup power units where volumetric energy density and form-factor flexibility outweigh cycle-life advantages of cylindrical alternatives. Trade specifics (MOQ, lead time, Incoterms) are absent from the listing and must be negotiated directly with the supplier. Certification claims of CE and RoHS are mentioned but should be verified with current test reports before import.

Joolee Battery (Shenzhen) Co., Ltd. is located at No. 165, 9th Road District, Dalang, Longhua, Shenzhen 518109, Guangdong, positioning it in the Longhua industrial zone north of central Shenzhen. The supplier holds imported tier and harbor trust tier designations, meaning the profile was imported with basic marketplace verification but without extensive platform-mediated validation. The response rate shows 0.00 % with zero average response hours, indicating no confirmed buyer engagement through同年 through the platform channel. No factory size, year of establishment, revenue, or employee count is provided in the source data.

The listing describes a broad capacity range (100 mAh to 50 Ah) that strongly suggests a pack assembler or custom battery house rather than a single-cell manufacturer. Buyers should clarify whether Joolee Battery manufactures pouch cells in-house, sources bare cells from tier-one cell makers (CATL, ATL, BYD, Samsung SDI, LG Chem), or operates as a design house and pack integrator. The Dalang address is consistent with light industrial and assembly operations. Direct factory audit or video verification is advisable before committing to volume, particularly for custom pack designs where cell sourcing traceability and BMS quality are critical.