[. . . ] [. . . ] IMPORTANT: Be sure replacement battery is the same size, shape, voltage and polarity as the one you are replacing. Charge for 16 hours before first use. MODELS Panasonic: KX-TG2420W, TG2420B, TG2421, TG2422, TG2431, TG2432, TG2620B, TG2620W , TG2621W, TG2622W, TG2631W, TG2632B, TG5761S, TG5771S, TG5776S , TG6700B, TG6702B, TGA570S , TGA571S, TGA5776S, TGA670B [. . . ] [. . . ]