14 TASCAM DR-100MKIII3 – PreparationPowering the unitThis unit uses a built-in rechargeable lithium-ion battery.This unit can also be powered by 2 AA batteries, by using acommercially-available USB cable to supply USB bus poweror by a TASCAM PS-P520E AC adapter. The USB cable can alsobe connected a TASCAM BP-6AA external battery pack ( soldseparately).This unit can use alkaline, Ni-MH or lithium AA batteries.Using the built-in batteryCharge it before using the unit the first time after purchase andafter it has not been used for a long time.8 Charging the built-in batteryThe built-in battery can be charged in the following two ways.• Charging with an AC adapterConnect a TASCAM PS-P520E AC adapter (sold separately)to the unit's USB port and charge the unit. (See “Using an ACadapter (sold separately)” on page 15.)The charging time is about 4.5 hours.• Charging from a connected computerUse a USB cable (A to Micro-B) to connect a computer to theunit's USB port and charge the unit. (See “9 – Connecting with aComputer” on page 45.)The charging time is about 10 hours.NOTE• Always connect this unit and the computer directly. Ifconnected through a USB hub or other device, chargingmight not occur properly.• When connected by USB, the unit will charge even when it isnot turned on.• The CHG (charge) indicator will light as follows whencharging.Lit orange: chargingLit green: charging completeCHG (charge) indicatorUsing AA batteries1. Slide the battery compartment cover toward the bottom ofthe unit to open it.2. Install 2 AA batteries with their ¥ and ^ marks as shown inthe battery compartment.3. Close the battery compartment cover.Set the type of batteries used in order to allow the unit toaccurately show the amount of power remaining and determinewhether enough power is available for proper operation. (Bydefault, this is set to alkaline batteries.) (See “Setting the AAbattery type” on page 40.)CAUTION• Manganese dry cell batteries cannot be used with this unit.• This unit cannot recharge Ni-MH batteries. Use a commer-cially available recharger.NOTEA great amount of power is required to provide phantompower to a condenser microphone. If you use a condensermicrophone while running the unit on AA batteries (alkaline,Ni-MH or lithium), the operation time will be shortened.If you need to operate the unit for a long time, use a TASCAMPS-P520E AC adapter or TASCAM BP-6AA external batterypack (both sold separately) to power the unit.8 Using both battery power supplies togetherContinuous operation for an extended amount of time ispossible by using the built-in battery and AA batteries together.When the amount of remaining power in the priority batterysource becomes insufficient, the unit automatically switches tothe other battery source and continues operating. (See “Set thepriority battery type” on page 40.)The AA batteries can be changed when the built-in battery ispowering the unit.CAUTIONChanging the AA batteries when they are powering the unitcould interrupt the power causing loss of recording dataand settings, for example.Before changing the AA batteries, confirm on the HomeScreen that the built-in battery has sufficient remainingpower and set the battery priority to the built-in battery.To use AA batteries as the priority battery type, afterchanging the batteries, set them as the priority type.You can change the priority battery type with the POWER/DISPLAY screen BATTERY item when stopped or playing orthe FUNCTION screen BATTERY item when recording or inrecording standby.