Rated capacity is 4000 mAh at 3.85 V. Capacity is the honest figure to compare between packs; quoted operating hours depend on the 5/5/90 duty cycle and fall with high power, analogue mode and cold weather.

Charge cycle life is 500 cycles. Lithium-ion capacity declines with cycles and with calendar age, so a pack in daily service typically needs replacing every two to three years — before it fails, not after a radio has died mid-shift.

Operating temperature range is 0~45°C (charge) / -20~60°C (discharge).