Xtar 21700 Battery with USB-C Charging

XTAR 21700 USB-C Li-ion Rechargeable Battery 5000mAh

USB-C Direct Charging

XTAR has integrated the intelligence of a charger directly into the battery, making charging simpler, safer and more convenient.

• Supports 5V / 1.2A fast charging.
• Smart 3-stage charging algorithm helps extend battery life.
• Automatically activates and begins charging when connected, even after over-discharge.
• More than rechargeable – it is self-managed.

A full charge via the integrated USB-C charging port takes approximately 4.6 hours. The battery is also compatible with 3.6V lithium battery chargers such as the XTAR VX4, allowing a full charge in approximately 3 hours.

Standard 21700 Size

Unlike many USB-C rechargeable 21700 batteries that are oversized and may not fit standard battery compartments, the XTAR 21700 USB-C Battery is designed to maintain standard dimensions for broad compatibility with flashlights, lighting equipment and other battery-powered devices.

Up to 800 Charge Cycles

With a cycle life of up to 800 charge cycles, this battery offers long-term reliability, reducing replacement costs and minimising environmental waste.

Multiple Layers of Protection

Safety is built into every battery, with multiple protective features designed to ensure reliable operation.

• Built-in explosion-proof valve.
• Protection against leakage, swelling and rupture under extreme conditions.
• Integrated XTAR protection board for safer operation.
• Stable and consistent performance throughout the battery's lifespan.

Balanced Cell Selection for Multi-Battery Devices

Devices using two or more batteries can suffer from reduced performance when battery cells are not properly matched. XTAR carefully tests and selects cells based on capacity and internal resistance to ensure consistent performance across each production batch. This helps prevent uneven discharge, runtime differences and performance loss in multi-battery applications.

Specifications