The Williams Sound BAT AP11A rechargeable infrared receiver battery is compatible with Williams Sound WIR RX18 headset receivers. To recharge the BAT AP11A you must use the CHG 518 5-receiver charger unit (sold separately).
To get the greatest life out of your products, use only Williams Sound batteries and chargers. Do not mix and match batteries and chargers from different suppliers!
Warranty: 90 day manufacturer’s limited warranty