AT&T Type # 4, 3.6V 650mAh Ni-CD Replacement Battery, 1X3-2/3AA/D Conn – Batteries and Butter
Radio Shack 23-895 Cordless Phone Battery Ni-CD, 3.6 Volt, 600 mAh - Ultra Hi-Capacity - Replacement for Panasonic P-P507, TYPE 18 Rechargeable Battery - Walmart.com
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