Installation guide

Williams Sound
®
Helping People Hear
20
BATTERY INFORMATION
DISPOSABLE BATTERIES
In normal use, a heavy-duty 9 Volt battery such as the Eveready 216 will last about 10 hours.
Alkaline batteries such as the Eveready 522 will provide about 32 hours of use. If the sound
becomes weak or distorted, replace the battery. The indicator light may still be on, even with
a battery that is weak. Do not leave dead batteries in the receivers. Battery corrosion is not
covered by the Williams Sound five year warranty.
RECHARGEABLE BATTERIES
The R7 can also use 6 or 7 cell nickel cadmium rechargeable batteries. Optimal battery life
is achieved with 7 cell batteries, such as the Williams Sound BAT 003. 6 cell batteries are
usually marked “7.2 V”; 7 cell batteries are marked “8.4 V”. A fully charged 7 cell battery
such as the BAT 003 will provide about 6 hours of operation per charge. Damage from
improper charging is not covered by the Williams Sound five year warranty.
The battery installed in the receiver may be recharged in the receiver only if it is a Nickel
Cadmium battery, and only if the correct Williams Sound charger is used.
Recharge batteries only with a Williams Sound BAT 005 Single Charger or a Williams Sound
CHG 1269A Multiple Charger. The charger is connected to the receiver through the EAR
jack. Make sure the receiver is turned off during charging. A complete recharge cycle takes
about 14 hours. Receivers should not be left charging continuously when not in use.
!! IMPORTANT WARNINGS !!
DO NOT ATTEMPT TO RECHARGE ZINC CARBON (“HEAVY DUTY”), ALKALINE, OR
LITHIUM BATTERIES!
DO NOT ATTEMPT TO RECHARGE DISPOSABLE BATTERIES!
These batteries may heat up
and explode, causing possible injury and damage to the equipment.
Avoid shorting the plus and minus battery terminals together with metal objects. Battery
damage and burns can result!
Use only Williams Sound Supplied chargers and batteries!