Review on Kastar 3 Pack Replacement Battery for Uniden BT-909 BT909 & Panasonic P-P102 - Compatible with DCT736, TRU9280, WXI477, WXI377, DCT737, DCT750, DCT756, DCT7565, DCT758, DCT7585, TRU9260, WHAMX4, WXI377, KX-TC1210, KX-TC1220, KX-TC1230 by Felicia Evans

I purchased these replacement batteries in January 2019. Maybe I'm expecting too much, but I'm disappointed with how quickly they don't hold a charge. My Uniden phones are about 19 years old. . Phones are replaced by a charging station whenever they are not actually being used. The original battery packs gave low battery warnings on two phones so I ordered these as a replacement. One of these replacement batteries started the low battery warning after about 45 minutes of talk time after about a year. I kept using it but before long it was completely dead after 10 minutes of talking. When a low battery alarm went off, I had to run and grab another phone before the line went offline. The other handset I used as a backup now gives a low battery warning, even after about 30 minutes. I am assuming that this battery will also fail soon. Ironically, the phone, which still has the original battery, will continue to charge and hold the charge for over an hour of talk time. I would not recommend this product unless it is cheap. (in cost) because it is cheap (in quality).