“Are these batteries compatible or the same as the Panasonic Original BK-40AAABU Rechargeable Phone Batteries 400mAh replacement for a cordless landline headset ? And do the batteries already come charged?”
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Hello Andrea! We would need to check the model of your phone in order to see which battery is compatible. If you need further guidance, kindly let us know and we will happily assist you. You can contact Support Team via Live Chat on the Panasonic Website, Contact Us option, Mon-Fri, 9am-5pm EST.
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