Rechargeable 18650 Li-ion Cell No name NCR18650B 3400mAh — Protected (1 pc)

No name rechargeable 18650 Li-ion cell with a nominal capacity of 3400mAh is a single, protected cylindrical battery designed for devices that accept 18650 cells. The cell includes an integrated protection circuit that guards against overcharge, over-discharge and short-circuit conditions. It is supplied as a single unit and is intended for replacement or custom battery packs in portable electronics such as flashlights, power banks and vaporizers.

Advantages

The built-in protection circuit reduces risk of damage from charging or discharging beyond safe limits and provides basic short-circuit protection. The cell’s 18650 size and standard voltage make it compatible with a wide range of devices that accept cylindrical lithium-ion cells. Sold individually, it allows selective replacement of a single cell or testing before assembling multi-cell configurations.

Suitable for

• High-drain flashlights and torches that accept 18650 cells
• Portable power banks and DIY battery packs
• Vaporizers and personal electronics designed for 18650 cells
• Battery replacement in devices requiring a protected 18650 cell

Key specifications

• Cell type: rechargeable lithium-ion, cylindrical 18650 format
• Nominal capacity: 3400 mAh
• Protection: integrated protection circuit for overcharge, over-discharge and short circuit
• Configuration: single cell, sold individually
• Typical applications: portable electronics that accept 18650-format cells

How to use

Use the cell only in devices and battery holders that are specifically designed for 18650 lithium-ion cells and that accept protected cells. Charge the cell with a compatible lithium-ion charger following the charger manufacturer’s instructions and the device’s guidelines. Observe polarity when inserting the cell and ensure the device’s contacts are clean and undamaged. Do not modify the protection circuit or attempt to dismantle the cell.

Usage recommendations

Store and transport the cell in a non-conductive container or original packaging. Avoid exposing the cell to temperatures outside the recommended range for lithium-ion batteries, mechanical damage, or sustained deep discharge. For long-term storage, keep the cell partially charged (around 40–60% state of charge) and check periodically. Replace the cell if you notice swelling, leakage, excessive heat during charging, or a significant drop in capacity.