503040 3.7V 600mAh LiPo Battery

Product Description — 503040

503040 Blue Series Solid State Rechargeable Lithium Polymer Battery | 3.7V 600mAh | Multi-Brand Compatible | In Stock

Overview

The 503040 Blue Series Solid State Lithium Polymer Battery represents the next generation of compact rechargeable cell technology. Delivering a reliable 3.7V nominal voltage and a substantial 600mAh capacity within a slim 5.0 × 30 × 40mm footprint, this battery combines the energy density of traditional LiPo with the enhanced safety and structural stability of solid-state electrolyte construction — eliminating the leakage, swelling, and thermal runaway risks associated with conventional liquid electrolyte cells.

Designed for broad multi-brand compatibility and available in stock for immediate shipment, the 503040 is the ideal power solution for OEM integration, aftermarket replacement, and wholesale supply across a wide range of compact portable electronics.

Product Specifications

Key Features

• Solid State Electrolyte Construction — The defining advantage of the 503040. By replacing conventional liquid electrolyte with a solid polymer medium, this cell fundamentally eliminates the risk of electrolyte leakage, eliminates pouch swelling under thermal stress, and dramatically reduces the likelihood of thermal runaway — delivering a measurably safer battery for enclosed device applications
• Blue Series Identification — The Blue Series designation signals a specific production grade with enhanced electrolyte formulation and tighter manufacturing controls, providing improved low-temperature discharge performance and better charge retention compared to standard-grade solid state cells
• 600mAh High Capacity in Compact Body — Delivers meaningful runtime in a 5.0 × 30 × 40mm package, providing enough energy capacity for extended GPS tracking sessions, multiple smartwatch charge cycles, or sustained IoT sensor operation between charges
• Flat 3.7V Stable Discharge Curve — Consistent voltage output from full charge to cutoff prevents erratic device behavior, sensor drift, or premature low-battery warnings in voltage-sensitive applications
• Zero Leakage Risk — Solid electrolyte is non-liquid and non-flammable, making the 503040 significantly safer than standard LiPo alternatives in sealed, enclosed, or body-worn device enclosures where electrolyte exposure would cause irreparable damage
• No Swelling Under Cycling — Solid state construction resists the volumetric expansion that causes standard LiPo pouches to swell over time, protecting device housings and maintaining consistent fit throughout the battery’s operational lifespan
• Superior Low-Temperature Performance — Maintains effective discharge capacity down to -20°C, ensuring reliable device operation in outdoor, cold-chain logistics, and industrial field environments where standard LiPo performance deteriorates
• Built-In Protection Circuit (PCM) — Comprehensive overcharge, over-discharge, over-current, and short-circuit protection provides an additional safety layer on top of the inherent safety advantages of solid-state chemistry
• Low Internal Resistance ≤ 150mΩ — Minimizes heat generation during charge and discharge cycles, further enhancing thermal safety and improving overall energy transfer efficiency
• 500+ Cycle Life — Engineered for long-term reliability, maintaining usable capacity across years of regular charge/discharge use with minimal degradation
• Multi-Brand Compatible — Designed as a universal replacement for devices using the 503040 cell format across a wide range of manufacturers and brands
• In Stock for Immediate Dispatch — Warehoused and ready for same or next business day fulfillment on all standard and bulk orders

Solid State vs Standard LiPo — Key Differences

Applications

• 📡 GPS trackers & personal / asset tracking devices
• ⌚ Smartwatches, fitness bands & activity trackers
• 🎧 TWS earphone charging cases & Bluetooth audio devices
• 🐾 Pet trackers & smart collar modules
• 🏥 Medical wearables & personal health monitors
• 🌐 IoT sensors, smart modules & wireless nodes
• 🚗 Vehicle tracking & fleet management units
• 💳 Smart cards & ultra-compact portable electronics
• 🔦 Handheld instruments & compact field devices

Why Solid State Chemistry Matters for Your Device

For Enclosed & Sealed Devices Traditional LiPo cells carry a real risk of electrolyte leakage if the pouch is punctured or compromised during assembly or use. In sealed device enclosures with no serviceability, a leaking cell causes catastrophic and irreparable damage to PCBs and components. The 503040’s solid electrolyte eliminates this failure mode entirely.

For Wearable & Body-Worn Applications Swelling is the most common long-term failure mode for standard LiPo in wearables — as the pouch expands, it warps housings, cracks screens, and creates pressure on internal components. Solid state construction maintains dimensional stability across its full rated cycle life.

For Outdoor & Cold-Climate Use Standard LiPo electrolyte viscosity increases significantly below 0°C, reducing effective discharge capacity and causing unexpected device shutdowns in cold environments. The 503040 Blue Series maintains stable performance down to -20°C.

Compatibility

The 503040 is engineered as a universal compatible replacement and OEM supply battery for all devices utilizing a 3.7V lithium polymer cell in the 5.0 × 30 × 40mm form factor, compatible with a wide range of consumer electronics brands and OEM devices.

⚠️ Please confirm your device’s battery cavity dimensions (5.0 × 30 × 40mm) and operating voltage (3.7V) before purchasing. Custom connector types, wire lengths, and lead polarity configurations are available on request to ensure perfect drop-in compatibility.

Why Choose This Battery

• 🏭 Factory Direct Supply — Manufactured entirely in-house with full end-to-end process control from solid electrolyte formulation through final QC testing
• ✅ In Stock & Ready to Ship — Warehoused inventory available for immediate same or next business day fulfillment on standard and bulk orders
• 🔬 100% Pre-Shipment Testing — Every unit individually tested for capacity output, voltage accuracy, internal resistance, and PCM function before dispatch
• 🔵 Blue Series Grade — Enhanced electrolyte formulation with improved low-temperature and charge retention characteristics versus standard solid state alternatives
• 🔧 Full OEM / ODM Support — Custom connector type, wire length and polarity, protective wrapping, capacity, and private label branding available for volume production orders
• 📋 Compliance Documentation — CE, RoHS, UN38.3 Test Report, and MSDS available for global import and regulatory compliance
• 🌍 Global Export Ready — Complete lithium battery hazardous goods documentation managed in-house for smooth, compliant international shipping

Package Contents

• 1× 503040 Solid State Li-Polymer Battery (3.7V / 600mAh) — Blue Series
• Optional: JST-PH 1.25 / 2.0mm connector | bare wire leads | custom connector harness | protective film wrap

💡 Volume pricing, private label packaging, and full OEM / ODM configurations available. Contact our sales team with your device specifications for a dedicated sample arrangement and volume quote.