Description

Summary

Designed for Warmth. Engineered for Safety. Built for Versatility.

The 7.4V 4000mAh Lithium Polymer Battery is specifically developed for heated vests, heated socks, gloves, jackets, and other wearable heating systems. Featuring a compact form factor with an integrated DC5521 plug, this battery offers plug-and-play convenience and a space-saving design ideal for apparel integration.

Manufactured using high-quality LiPo cells with ternary lithium chemistry, the battery offers a safe, explosion-free heating experience, over 500 charge cycles, and customizable specs to match your unique wearable product.

7.4V 4000mAh Lithium Polymer Battery Technical Information

Model: Heated Vest Battery Pack

Battery Type: Lithium Polymer Battery

Nominal Capacity: 4000mAh

Nominal Voltage: 7.4V

Nominal Energy: 29.6Wh

Charge Cut-off Voltage: 8.4V

Discharge Cut-off Voltage: Typically 6.0V, Minimum 5.5V

Standard Charge Current: 0.2C (800mA)

Max Charge Current: 1C (4000mA)

Standard Discharge Current: 0.2C (800mA)

Max Continuous Discharge Current: 1C (4000mA)

Max Peak Discharge Current: 2C (8000mA)

Cycle Life: More Than 500 Times

Dimensions: 17 × 57 × 81 mm

Weight: 130g

Charge Temperature Range: 0°C to 45°C

Discharge Temperature Range: -20°C to 65°C

Storage Temperature Range:

• -20℃~25℃: More than 12 months
• -20℃~45℃: Less than 3 months
• -20℃~60 ℃: Less than 1 month

PCB/PCM: Yes

Connector: DC5521, DC5525 or others

✅ Key Product Features

🧥 Perfect Fit for Heated Clothing Applications

This battery is specifically sized for heated vests, jackets, gloves, insoles, and socks — offering long-lasting warmth without bulking up the garment.

🔌 DC5521 Output – Integrated Plug for Easy Use

No adapters required. The DC5521 charge/discharge port is integrated directly into the battery, allowing direct connection to heating elements with no extra wiring or space taken.

🪶 Compact & Lightweight Design

Our engineering optimizes both battery volume and weight, ensuring comfort and flexibility in garments — especially important in consumer-facing wearable tech.

🔋 Ternary Li-ion Chemistry – High Energy, High Safety

Using LiNiMnCoO₂-based (NMC) lithium polymer cells, the battery offers:

• ✅ Higher energy density than LiFePO₄

• ✅ Lighter weight than 18650-based packs

• ✅ Safe, non-explosive performance

• ✅ Stable output curve during discharge

♻️ Long Cycle Life & Stable Heating Performance

Designed for daily wearables, this battery maintains ≥80% capacity after 500+ full charge-discharge cycles — a durable solution for cold-season or all-year heated clothing.

🎨 OEM Support with Low Minimum Order Quantity

Want to integrate your brand or need a custom form factor? We support:

• Custom size, shape, and capacity

• Custom output cable (DC, USB, magnetic)

• Custom housing (soft pack, ABS, waterproof)

• Custom label, logo, sticker design

🧩 Ideal Applications

• Heated Vests, Jackets, Hoodies

• Heated Gloves, Socks, Insoles

• Wearable Physiotherapy & Medical Heating Pads

• Motorcycle Gear, Hunting Apparel, Ski Wear

• USB-Powered Heated Blankets, Cushions

❓ Frequently Asked Questions (FAQ)

1. Can this battery be used for all heated vests?

Yes — the 7.4V platform and DC5521 connector are widely supported. For other connectors or voltages, we offer custom options (e.g., USB-A, USB-C, XT30, etc.).

2. How long can the battery work when fully charged?

Typical usage at medium heat can last 6–10 hours, depending on power draw and temperature settings of your heating system.

3. Is the battery explosion-proof?

It uses lithium polymer technology with safe NMC chemistry, and all packs are protected with PCM/BMS circuits to prevent overcharging, short circuits, and overheating. No risk of thermal runaway like older Li-ion types.

4. Can you put my logo on the battery?

Absolutely. We support custom labels, OEM packaging, and full brand customization, even for smaller orders.

5. Do you provide waterproof or soft-shell versions?

Yes, we can customize both soft polymer pouches and hard ABS housings, with optional IP-rated enclosures for outdoor and wet conditions.