Sony MDR-RF850RK Approx, Battery, Battery life, changing hours, Approx. hours*1, Notes on Batteries, Approx. usage time*1, Charging and usage hours

Charging and usage hours

Approx.	*Approx. usage time1**
changing hours
changing hours	MDR-RF820RK	MDR-RF850RK

1 hour	80 minutes*3	75 minutes*3
16 hours*2	18 hours*3	15 hours*3

*1 at 1kHz, 1mW+1mW output

*2 hours required to fully charge empty batteries *3 Time stated above may vary, depending on

the temperature or conditions of use.

Using the headphones with dry batteries (sold separately)

Commercially available (size AAA) dry batteries can also be used to power the headphones. Install the batteries in the same manner as described in steps 1 through 3 of “Charging the supplied rechargeable batteries.”

When dry batteries are installed, the battery charge function is not activated.

Battery life

(Using Sony alkaline battery LR03/AM-4(N))

Battery	*Approx. hours1**
MDR-RF820RK	28 hours*2
MDR-RF850RK	24 hours*2

*1 at 1kHz, 1mW+1mW output

*2 Time stated above may vary, depending on the temperature or conditions of use.

Notes on Batteries

•Do not charge a dry battery.

•Do not carry a dry battery together with coins or other metallic objects. It can generate heat if the positive and negative terminals of the battery accidentally come into contact with metallic objects.

•If you are not going to use the unit for a long time, remove the battery to avoid damage from battery leakage or corrosion.

Checking the remaining battery power

Pull up the self-adjusting band and check the power indicator located on the upper part of the right housing. The batteries are still serviceable when the indicator lights in red.

Charge the rechargeable batteries or install new dry batteries if the power indicator light dims, flashes, or the sound becomes distorted or noisy.

Note

The rechargeable nickel-metal hydride batteries should be replaced with new ones when they last only half the expected time after a proper recharging. The rechargeable batteries type BP-HP550 are not commercially available. You can order the batteries from the store where you purchased this system, or at your nearest Sony dealer.