Sony MDR-DS4000 Operating Instructions - Page 12
Checking the remaining battery power, Using the headphones with alkaline batteries (sold separately) - battery life
UPC - 027242650008
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Checking the remaining battery power Pull up the self-adjusting band and check the POWER indicator located on the right housing. The batteries are still serviceable when the indicator lights red. Charge the rechargeable batteries or install new alkaline batteries if the POWER indicator light dims, flashes, or the sound becomes distorted or intermittent. Note POWER indicator The rechargeable nickel-metal hydride batteries should be replaced with new ones when they last only half the expected time, after a full charge has been performed. 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. Using the headphones with alkaline batteries (sold separately) Commercially available (size AAA) alkaline batteries can also be used to power the headphones. Install the batteries in the same manner as described in "Inserting the supplied rechargeable nickel-metal hydride batteries" (page 9). When dry batteries are installed, the battery charge function is not activated. Battery life Battery Sony alkaline battery LR03/AM-4(N) Approx. hours*1 13 hours*2 *1 at 1 kHz, 1 mW + 1 mW 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 battery together with coins or metallic objects. Heat can be generated by the battery if its positive and negative terminals are accidentally shorted. • When you are not going to use the unit for a long time, remove the batteries to avoid damage from battery leakage or corrosion. See "Checking the remaining battery power" for details about checking the remaining battery power. 12GB Preparation