304050 3.7V 1500mAh LiPo Battery

Product Description — x04050 Series

x04050 Series Rechargeable Li-Polymer Battery | 3.7V 1500mAh | 304050 · 404050 · 504050 · 604050 · 704050 · 804050 · 904050 | Multi-Thickness OEM Supply

Overview

The x04050 Series Li-Polymer Battery is a comprehensive family of 3.7V / 1500mAh rechargeable pouch cells sharing an identical 40 × 50mm planar footprint across seven distinct thickness variants — from the ultra-slim 3.0mm of the 304050 through to the robust 9.0mm of the 904050. This unique multi-thickness architecture allows device designers and OEM manufacturers to select the exact cell dimensions that best match their enclosure geometry, without any compromise on voltage, capacity, or electrical performance.

Whether your application demands the thinnest possible profile for a smart card or ultra-slim wearable, or the greater thickness of the 904050 for a device where Z-height is not a constraint, the x04050 series delivers consistent 1500mAh true capacity and stable 3.7V output across every variant — all sourced from a single supplier, on a single purchase order, with unified QC standards and compliance documentation.

Full Series Specifications

Common Electrical Specifications (All Variants)

Key Features

• Seven Thickness Variants — One Unified Platform — The x04050 series covers thickness options from 3.0mm to 9.0mm in 1.0mm increments, all delivering the same 1500mAh capacity and 3.7V output. This gives design engineers maximum layout flexibility without requiring multiple supplier relationships or separate qualification processes for each thickness variant
• Consistent 1500mAh True Capacity Across All Variants — Every model in the series is independently verified to deliver the rated 1500mAh capacity regardless of thickness. Thicker variants achieve the same capacity rating through optimized electrode stacking rather than capacity inflation — ensuring buyers receive exactly what is specified
• Ultra-Slim 304050 Option — At just 3.0mm thick, the 304050 is among the slimmest 1500mAh LiPo cells commercially available, enabling integration into smart cards, ultra-thin wearables, payment terminals, and slim-profile IoT devices where Z-height is the primary design constraint
• Standard Form Factor 504050 — The 5.0mm 504050 represents the sweet spot of the series — the most commonly specified thickness for mainstream portable electronics, offering the best balance of structural rigidity, thermal management, and dimensional compatibility with standard device enclosures
• Stable 3.7V Flat Discharge Output — Consistent voltage delivery from full charge to cutoff prevents performance degradation, sensor drift, or unexpected device shutdowns across all seven thickness variants
• Low Internal Resistance ≤ 150mΩ — Minimizes heat generation and voltage sag during peak-current events, ensuring reliable operation across the full range of applications from always-on IoT sensors to burst-drain GPS and Bluetooth devices
• Built-In Protection Circuit (PCM) — Standard overcharge, over-discharge, over-current, and short-circuit protection on all units, with bare cell supply available for OEM applications with dedicated external BMS
• 500+ Cycle Life — Long service lifespan across the entire series, suitable for consumer electronics applications requiring 2–5 year device lifespans
• Single Supplier Convenience — Source all seven thickness variants from one factory, one quality system, one compliance certificate set, and one logistics relationship — dramatically simplifying procurement for multi-product OEM lines
• In-Stock Multi-SKU Availability — Multiple variants from the series maintained in warehouse inventory for immediate fulfillment, reducing lead time risk for both prototype and production orders

Thickness Selection Guide

💡 If your device enclosure accommodates any thickness within the 3.0–9.0mm range with the same 40 × 50mm planar footprint, the x04050 series allows you to maximize capacity utilization within your available Z-height — simply select the thickest variant your housing allows for the highest practical energy density.

Applications

• 📡 GPS trackers & real-time asset / personal tracking devices
• ⌚ Smartwatches, fitness trackers & health wearables
• 💳 Smart cards, payment terminals & thin portable devices
• 🎧 TWS earphone charging cases & Bluetooth audio devices
• 🏥 Medical wearables, portable monitors & personal health devices
• 🌐 IoT sensors, smart modules & wireless field nodes
• 🔊 Portable Bluetooth speakers & compact audio devices
• 🎮 Handheld gaming devices & portable entertainment systems
• 🔦 Portable instruments, scanners & industrial handhelds
• 🔋 Compact portable power accessories & backup modules

Multi-SKU OEM Procurement Advantages

OEM & Customization Options

Quality Control

Compliance & Documentation

Why Choose This Series

• 🏭 Factory Direct — All variants manufactured in-house under unified quality and process controls — no trader, no intermediary
• 📐 Seven Thickness Options — Unmatched design flexibility within a single 40 × 50mm planar footprint and consistent 1500mAh capacity platform
• ✅ Multi-SKU In-Stock — Key variants warehoused for immediate dispatch — no lead time on standard orders
• 🔬 100% Unit-Level QC — Every cell across all variants individually capacity and IR tested before shipment
• 🔧 Full OEM Support — Connector, wire, PCM, branding, and packaging all configurable per variant per order
• 📦 Combined Volume Pricing — Aggregate order quantity across multiple SKUs qualifies for improved pricing tiers
• 🌍 Global Export Ready — Complete hazmat and compliance documentation for smooth international shipping

Package Contents

• 1× Selected x04050 Series Li-Polymer Battery (3.7V / 1500mAh)
• Specify: 304050 / 404050 / 504050 / 604050 / 704050 / 804050 / 904050
• Optional: JST connector / bare wire leads / 3-wire NTC / custom harness / protective wrap

💡 Multi-SKU sample sets available — evaluate multiple thickness variants simultaneously before finalizing your enclosure design. Contact our sales team with your device dimensions and application for a personalized thickness recommendation and consolidated quotation.