The Weltool INR series lithium-ion batteries are original cells without additional protection circuits. When using, please make sure not to over-discharge or over-charge the battery. INR21-60 is a high-capacity 21700 rechargeable lithium-ion battery. This battery is a button top with a battery diameter of 22mm.

*** Price is listed per battery ***

  • Battery model: INR21-60
  • Battery capacity: 6000mAh (measured capacity 5850mAh~6000mAh)
  • Internal resistance: ≤25mΩ
  • Nominal voltage: 3.60V
  • Maximum continuous discharge current at room temperature: 12A (0~35℃)
  • Continuous discharge current at low or high temperature: 6A (-25~0℃) or (35~45℃)
  • Charger peak charging current: 4.2A (15℃- 45℃)
  • Standard charging current: 3A (25℃ ± 2℃)
  • Overcharge protection voltage: 4.2±0.05V
  • Over-discharge protection voltage: 2.5±0.1V
  • After 600 cycles of charge and discharge, the battery still retains 70% capacity
  • Charging temperature: +0~+45℃
  • Discharging temperature: -20~+60℃
  • Battery size: 22.0±0.2 mm (diameter), 73±0.2 mm (length)
  • Weight: 73±2g


  • Do not immerse the battery in water.
  • Do not place it near a heat source such as a fire source or heater.
  • Do not use over-discharge. Stop discharging when the battery voltage drops to 2.75 V.
  • When charging, use a professional charger with overcharge protection.
  • Do not reverse the positive and negative poles.
  • Do not connect the positive and negative terminals directly to metal objects.
  • Do not pierce the battery with nails or other sharp objects.
  • Do not disassemble or modify the battery.

WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to: www.P65Warnings.ca.gov


Weltool INR21-60 6000mAh (21700) Rechargeable Lithium-Ion Battery

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