Ampace INR21700- JP40 4000mAh - 70A

Ampace INR21700 JP40 4000mAh Battery Cell - 70A

The Ampace INR21700 JP40 4000mAh is a high-performance 21700 lithium-ion cell built for demanding hobby applications where strong output, solid capacity, and low internal resistance really matter. With a typical capacity of 4000mAh and very low internal resistance of just 2.8 mΩ, this cell is a great choice for high-drain DIY battery packs, power projects, and other advanced enthusiast builds.

If you are looking for a 21700 cell that combines high current capability with good runtime, the Ampace JP40 stands out as a serious option for users who need reliable performance under load.

• Cell model: Ampace INR21700 JP40
• Typical capacity: 4000 mAh
• Minimum capacity: 3900 mAh
• Nominal voltage: 3.7 V
• Max charge voltage: 4.2 V
• Cut-off discharge voltage: 2.5 V
• Internal resistance: 2.8 mΩ (AC 1kHz, average of five cells)
• Recommended continuous discharge: 45 A
• Maximum discharge current: 140 A
• Standard charging current: 2 A
• Maximum charging current: 8 A
• Diameter: 21.3 mm
• Height: 70.4 mm
• Weight: 70 g

Why choose the Ampace JP40?

• High-capacity 21700 cell for longer operating time
• Excellent low-resistance design for efficient power delivery
• Very strong discharge capability for high-drain hobby use
• Great fit for custom battery packs and enthusiast-grade power setups
• A balanced choice for users who need both power and endurance

This cell is intended for experienced users and hobby applications. It works especially well in projects where high current output and dependable performance are key. Before use, make sure your device or pack design matches the cell’s specifications and operating limits.