This rule can also be applied to the batteries of the phones but not directly because the battery life is 3 years but because the average charge cycles are between 900 and 1000 cycles for medium. The results are estimates only. 3dio Free Space Thing 1 A brand new 9V alkaline battery will last approximately 300 hours of continuous use. . The battery is used to power the microphone capsules and lasts 300 hours of continuous use. Battery The 3Dio FS contains a 9V alkaline battery within the chassis. It is that simple. The Calculator provides how long a battery will last. As the battery ages that time decreases to the point you may only get 6-8 hours out of a single charge. The actual results will vary with battery condition age temperature discharge rate and other factors. 14-20 to 58 Microphone Stand Adapter. The 3Dio FS contains a 9V alkaline battery within the chassis. The calculator will calculate the bat...