Battery Li‑Ion EVE 21700 3.6V 5000mAh 15A (Ø21.2×70.7mm) single cell by electro base

The Battery Li‑Ion EVE 21700 3.6V 5000mAh 15A single cell by electro base is a high‑capacity cylindrical rechargeable cell with a nominal voltage of 3.6 V and a rated capacity of 5000 mAh. Its 21700 format and Ø21.2×70.7 mm dimensions make it compatible with devices that accept 21700 cells. The cell is designed for applications requiring long runtime at moderate continuous discharge currents, offering a balance between energy density and discharge performance.

Advantages

This EVE 21700 cell provides a large usable capacity in a standard 21700 form factor, enabling extended run times for portable equipment. With a rated continuous discharge current up to 15 A, the cell supports devices that need sustained moderate current without resorting to specialized high‑drain cells. The cylindrical construction and common dimensions ensure mechanical compatibility with many battery holders and packs intended for 21700 cells, while rechargeable chemistry reduces long‑term operating cost compared with disposable alternatives.

Suitable for

• Power banks and high‑capacity portable chargers that accept 21700 cells
• Flashlights and portable lighting devices with moderate discharge requirements
• E‑bikes and electric scooters that use 21700 cells in their battery packs with moderate current draw
• Portable electronics and DIY battery packs where long runtime is prioritized over extreme discharge rates

When it may not be suitable

This cell is not intended for applications that require very high continuous discharge currents well above 15 A, such as some high‑power vaping devices, power tools, or high‑C‑rate motor controllers. For designs requiring peak currents or rapid pulsed loads beyond the rated 15 A, choose a cell specified for higher continuous and pulse discharge capabilities. Also, single cells must be used with appropriate protection and battery management when assembled into multi‑cell packs.

Key specifications

• Cell type: cylindrical lithium‑ion rechargeable cell (21700)
• Nominal voltage: 3.6 V
• Rated capacity: 5000 mAh
• Rated continuous discharge current: up to 15 A
• Dimensions (approx.): diameter 21.2 mm, length 70.7 mm
• Chemistry: lithium‑ion (rechargeable)

How to use

Use the cell only in devices designed to accept 21700 cylindrical cells and within the device’s specified voltage and current limits. Charge the battery with a compatible lithium‑ion charger that follows recommended charge profiles for 3.6 V nominal cells and terminates charge at the appropriate maximum voltage. Avoid overdischarge; many devices include a low‑voltage cutoff or use a battery management system when multiple cells are combined. Do not modify, short‑circuit, puncture, or expose the cell to high temperatures or open flame. Follow manufacturer guidelines for safe handling, charging, storage, and disposal.

What to consider before purchase

• Verify the device accepts 21700 cells and has space for Ø21.2×70.7 mm dimensions
• Confirm that a 15 A continuous discharge rating meets your device’s current demands
• Plan for proper charging equipment compatible with lithium‑ion cells of this nominal voltage
• Consider battery management or protection when assembling multi‑cell packs

Usage recommendations

For best lifetime and safety, charge with a suitable lithium‑ion charger, avoid deep discharge, keep cells within recommended temperature ranges, and use protective circuitry when combining cells into packs. Store batteries partially charged in a cool, dry place for longer shelf life.