he TENPOWER INR18650-28HE is a cylindrical lithium-ion cell that embodies the balance between energy and performance. Its name hints at capacity (28 = 2800 mAh) and a design for relatively high current. Encased in the familiar 18650 shell, it looks compact and familiar, blending into battery packs or individual use seamlessly. The outer wrapper is printed with model codes and safety markings.

Inside the steel cylinder lies layered lithium chemistry built for both energy density and stable output. The cell is engineered to respond reliably under load, delivering its stored chemical energy into electrical current with minimal internal resistance losses. Though its design is simple in outward form, the internal architecture is carefully arranged: electrodes, separators, electrolyte, and safety vent structures all cooperate to maintain performance and safety. The cell feels solid in hand, with firm construction, and its terminals present the expected positive and flat-negative ends.

When integrated into devices or battery packs, the INR18650-28HE becomes a dependable power source. Its moderate discharge capabilities make it suitable for applications where bursts of current are needed but long-lasting energy is also valued. It can be placed in series or parallel arrays, be partially charged or discharged over its life, and integrated with battery management systems. Though it’s unprotected (i.e. no built-in circuit), when used properly it offers a predictable and stable power backbone for a wide range of electronics whether portable tools, flashlights, or backup systems.

Features:

• High energy density design.
• Moderate high-drain capability.
• Low internal resistance.
• Reliable chemical stability.
• Long cycle durability.
• Safety vent / pressure relief mechanism.
• Flat negative terminal (common 18650 form).

Specifications: