NCR18650BD — 18650 lithium-ion cell

About the Panasonic NCR18650BD 18650 Li-ion Cell 3,180 mAh

The NCR18650BD is Panasonic's long-cycle 18650, and the BD-Improved version is marketed as a "fit and forget" cell. Because it is charged to 4.15 V from the start, it needs neither a state-of-health check nor a mid-life charge-voltage reduction — which removes cost from the charging electronics and the BMS logic.

Why pack builders specify it

• BD-Improved charges at 0.3 C to 4.15 V from day one with no SOH check and no mid-life voltage reduction
• Panasonic rates it for stable performance across a wide discharge-rate and temperature range
• 11.4 Wh typical at 613 Wh/L and 217 Wh/kg, with low self-discharge
• Reduced engineering cost in the charging system because life-end control is not required

Typical applications

• UPS and data-centre backup – Long standby life with predictable replacement intervals
• Telecom and grid backup – Low self-discharge suits equipment that sits idle for months
• Residential and commercial ESS – Where cycle count over years matters more than peak watt-hours
• Medical monitoring equipment – Panasonic positions the BD for high-reliability, long-life service
• Industrial metering – Fit-and-forget deployments with no scheduled battery maintenance

Where it fits

Choose the BD for anything that has to work for years without battery management attention — UPS, metering, backup. Choose the GA when you need the extra 270mWh per cell and can implement the 4.2 V-to-4.15 V life-end control in the BMS.

Charging and pack integration

Charge CC-CV to 4.2 V (4.15 V for BD-Improved standard charge) within the current limits listed above and stop discharge at 2.5 V. These are unprotected industrial cells: a BMS or protection circuit is required, interconnects must be resistance or laser welded rather than soldered, and cells of different model, batch or state of charge must not be mixed in one pack. Charging below 0 °C is not permitted unless the pack implements a low-temperature charge strategy.

Certifications and documentation

UN38.3, MSDS, IEC 62133-2, CE, RoHS, REACH, PSE, KC, CQC. UN38.3 test summary, MSDS and the cell specification are available on request.

Packaging

Specification basis: Official Panasonic data.