7.4V 4000mAh Rechargeable Lithium-ion Battery Pack for Bluetooth Speaker, Boat, DIY Electronics & Portable Devices

Upgrade your Bluetooth speaker or portable device with the HKN 7.4V 4000mAh Lithium-ion Battery Pack, designed for Boat Bluetooth speakers, DIY electronics, portable music systems, toys, and robotics projects. This high-capacity battery ensures longer playtime, reliable backup power, and stable performance for your devices.

✅ Specifications:

• Voltage: 7.4V (2S Configuration)

• Capacity: 4000mAh

• Type: Rechargeable Lithium-ion Battery Pack

• Applications: Bluetooth Speakers (Boat, JBL, DIY), Toys, Robotics, LED Projects, Electronic Gadgets

• Compact, lightweight, and durable design

✅ Key Features:

• High energy density for long-lasting backup

• Built-in rechargeable lithium-ion technology for safety & durability

• Perfect replacement battery for Boat Bluetooth speakers and similar devices

• Compact size, easy to integrate in DIY projects

⚡ Why Choose HKN Batteries?
HKN Enterprises provides premium quality lithium-ion batteries with reliable performance, safety, and efficiency. Perfect for upgrading your Bluetooth speakers, robotics projects, solar-powered devices, and other electronics.