Baterie litiu-ion VIDEX 21700 4000mAh fără protecție în vrac/1buc

VIDEX 21700 4000 mAh Li‑Ion Battery (simple “bulk / 1 pc / no protection” battery) — what it is and what to expect:

✅ Overview

The VIDEX 21700 4000 mAh is a high-capacity rechargeable lithium-ion (Li-ion) cell, standard 21700 size, designed for devices that require long runtime or high energy output. VIDEX+1

• Type: Li-ion rechargeable battery, 21700 format, without internal protection circuit (unprotected). VIDEX+1

• Nominal voltage: 3.7 V VIDEX+1

• Capacity: 4000 mAh — generous energy storage for extended runtime. VIDEX+1

• Dimensions / Size: Diameter approx. 21 mm and length approx. 70 mm — matches standard 21700 dimensions. VIDEX+1

• Weight (typical): ~ 65 g. VIDEX+1

🔋 What it’s Good For / Usage Scenarios

Because of its high capacity and standard 21700 format, this battery is suitable for:

• High-drain devices needing sustained power: e.g. powerful flashlights, portable tools, some electronics. VIDEX+1

• Projects or devices where external battery-management / protection circuitry is already provided — since this cell is unprotected, it is not ideal if you rely only on the battery for safety. Common Sense Home+1

• Applications requiring larger energy storage than typical 18650 cells — longer runtimes, more capacity per cell. The Engineering Knowledge+1

⚠️ Important Considerations & Safety Notes

• No internal protection circuit: This means the cell does not prevent over-charge, over-discharge, short circuit or over-current by itself. Using it safely requires a device or external electronics that manages these conditions. Common Sense Home+1

• Use appropriate charger: Must be charged with a charger suited for unprotected Li-ion cells (constant current / constant voltage up to ~4.2 V), and avoid over-discharging below safe cut-off voltage. The Engineering Knowledge+1

• Handle with care: As with all unprotected high-capacity Li-ion cells — avoid short-circuiting terminals, avoid extreme temperatures, avoid mechanical damage. The Engineering Knowledge+1

🎯 Why You’d Pick This Battery

• You need a compact but high-capacity battery for devices or DIY projects — 4000 mAh in standard 21700 form.

• You are building or using a device that already includes proper battery management / protection — so you don’t need protection built into the cell.

• You want to maximize energy per cell (vs smaller cells) — good for long-duration or high-output applications.