SANYO UR18650-ZM2 HBG Li‑Ion battery 18650 3.7 V 2420 mAh with Z‑tab (single cell)

SANYO UR18650-ZM2 HBG is a cylindrical Li‑Ion rechargeable cell in 18650 format with a nominal voltage of 3.7 V and a rated capacity of 2420 mAh. The cell is fitted with a Z‑tab (Z‑lötfahne) that enables soldering or spot‑weld connections, making it suitable for integration into custom battery packs and DIY assemblies. Its compact size and relatively high energy density make it appropriate for portable electronics and devices that require a single high‑energy 18650 cell.

Advantages

The Z‑tab design simplifies mechanical and electrical connection methods such as soldering or spot‑welding, facilitating secure assembly into multi‑cell packs or holders. With a nominal 3.7 V and 2420 mAh capacity, the cell provides a balance of energy density and run time for many portable applications. The standard 18650 dimensions ensure compatibility with a wide range of holders, chargers and device designs that accept cylindrical cells.

Suitable for

• Custom battery packs assembled by soldering or spot‑welding tabs
• DIY electronics and maker projects requiring a single 18650 cell
• Flashlights and portable lighting devices designed for 18650 cells
• Power banks and backup power modules where a single cell is appropriate
• Repair or replacement of devices originally using 18650 cylindrical Li‑Ion cells

When it may not be suitable

This single cell does not include built‑in protection electronics such as overcharge, overdischarge or short‑circuit protection; therefore it may not be appropriate for direct use in applications that require protected cells. It is also not intended as a drop‑in replacement in devices that require a specific protected or manufacturer‑matched cell format or integrated battery pack with a management system.

Key specifications

• Cell type: Lithium‑ion cylindrical cell (18650 format)
• Nominal voltage: 3.7 V
• Rated capacity: 2420 mAh
• Connection: Z‑tab for soldering or spot‑welding
• Typical applications: single‑cell packs, DIY electronics, flashlights
• Form factor: cylindrical, standard 18650 dimensions

How to use

Use this cell as part of a properly designed battery pack or as a single replacement cell in compatible devices. For secure electrical connections, attach leads using appropriate spot‑welding or soldering techniques to the Z‑tab; ensure proper temperature control while soldering to avoid heat damage. If assembling multiple cells, use a battery management system (BMS) or protection circuitry to balance cells and protect against overcharge, overdischarge and short circuits. Charge the cell with a charger designed for lithium‑ion chemistry and the nominal voltage specified.

What to consider before purchase

• Requires external protection circuitry if protection is needed
• Verify physical dimensions and tab orientation for your assembly
• Ensure your charger and charging method are suitable for Li‑Ion cells
• Confirm that spot‑welding or soldering methods are acceptable for your build

Usage recommendations

For safe and reliable operation, incorporate a proper protection circuit or BMS when using this single Li‑Ion cell in battery packs, avoid exposing the cell to extreme temperatures, and follow manufacturer guidelines for charging rates. When soldering directly to the Z‑tab, limit heat exposure and use appropriate flux and soldering equipment or opt for spot‑welding for lower thermal stress.