Rechargeable 18650 Li-Ion Battery ARMYTEK A00205 3500mAh Protected

Rechargeable 18650 Li-Ion Battery ARMYTEK A00205 3500mAh Protected is a high-capacity 18650-size lithium-ion cell designed for devices that accept standard 18650 batteries. The cell provides a nominal voltage of approximately 3.6–3.7 V and a rated capacity of 3500 mAh. Built-in internal protection circuitry helps guard against overcharge, overdischarge and short circuits when paired with compatible chargers and equipment, making it suitable for portable lighting and electronic devices that require reliable, rechargeable power.

Advantages

The battery combines high nominal capacity with protective electronics, offering extended runtime compared with smaller cells and additional safety features to reduce risks associated with incorrect charging or device faults. Its 18650 form factor ensures compatibility with a wide range of flashlights, headlamps and other portable devices. The cell’s chemistry delivers stable voltage under load and is rechargeable for repeated use, reducing the need for disposable batteries.

Suitable for

• High-drain flashlights and tactical torches
• Headlamps and wearable lighting
• Portable electronics that accept 18650 cells
• Battery packs and DIY power projects using protected 18650 cells

Key specifications

• Cell type: rechargeable lithium‑ion (18650 form factor)
• Nominal voltage: ~3.6–3.7 V
• Rated capacity: 3500 mAh
• Protection: internal protection circuitry for overcharge, overdischarge and short circuit
• Typical use: replaceable rechargeable cell for devices accepting protected 18650 batteries

How to use

Insert the battery into compatible devices observing correct polarity markings. Charge the cell only with chargers that support protected lithium‑ion 18650 cells and follow the charger manufacturer’s instructions. Avoid using damaged or swollen cells and replace the battery if protection circuitry appears compromised. Use the battery in devices that electrically and dimensionally accept 18650 cells and ensure device contacts are clean and undamaged before installation.

Usage recommendations

Store the battery in a cool, dry place and avoid prolonged exposure to high temperatures. For best cycle life, use a quality charger designed for lithium‑ion cells, avoid deep discharges where possible, and inspect the cell regularly for signs of wear or damage. Dispose of the battery according to local regulations for lithium‑ion cells.