Nitecore® NL1840 Li-ion Rechargeable Battery

NL1840 is a high-capacity 18650 Li-ion rechargeable battery built to extend runtime in devices designed for 18650 cells (flashlights, headlamps and other compatible gear). With 4,000mAh (14.4Wh), it reduces battery swaps during longer sessions, and in compatible devices it can also serve as an alternative to CR123A battery setups.

NL1840 features a protected design (overcharge/over-discharge/short-circuit protection) plus a pressure relief valve, reinforced ends, abrasion-resistant coating and IPX6 water resistance. It’s rated for 500 full charge cycles and specified to retain over 80% capacity at 500 cycles.

• Type: 18650 Li-ion rechargeable battery;
• Energy: 4,000mAh, 3.6V (14.4Wh) | Energy density: 288mWh/g;
• Cycle life: 500 full charging cycles;
• Water resistance: IPX6 (splash & rain resistant);
• Safety features: protection circuit against overcharge/over-discharge/short circuit; pressure relief valve;
• Durability: reinforced ends (nickel-plated stainless protector) + abrasion-resistant coating;
• Materials: mercury-free, lead-free, cadmium-free;
  
• Size & weight: 18.6 ±0.3 mm diameter; 69.8 ±0.3mm length & 50g.