The Weltoo INR21-40P is a high-performance 21700 Li-ion battery, designed for demanding applications that require high discharge currents. With a maximum discharge rate of 45A, this battery is ideal for high-drain devices such as power tools, vaping mods, torches, and other electronics that demand reliable power.

Specifications:

• Model: INR21-40P
• Capacity: 4000mAh
• Internal resistance: ≤12mΩ
• Voltage: 3.65V
• Continuous discharge current : 45A（-20-60 ℃）
• Max. charger charging current:  6A (15℃- 45℃)
• Standard charging current: 2A（25℃ ± 2℃）
• Overcharge protection voltage: 4.2±0.05V
• Over-discharge protection voltage: 2.5±0.1V
• Cycle charge and discharge times: 300 times, the battery has 60% capacity
• Charging temperature: +0~+45 ℃
• Discharge temperature: -20~+60℃
• Storage temperature: -20~+40℃ (Less than 3 months)
• Dimensions: 21.0±0.2 mm (diameter), 70.4±0.2 mm (length)
• Weight: 66±2g

Warnings:

• Keep battery away from water and heat sources.
• Avoid over-discharge (stop at 2.75V).
• Use a professional charger with overcharge protection.
• Do not reverse polarity or short-circuit.
• Avoid puncturing, disassembling, or modifying the battery.