BT 3520 Cordless Phone Batteries BT3520 AAA NiMH 1.2V 500mAh 2-Pack
Pack of 2 replacement BT 3520 cordless phone batteries. As detailed in BT instruction manual, the recommended replacement batteries for the BT 3520 phones are rechargeable NiMH 1.2V AAA 500mAh cordless phone batteries. When replacing the BT3520 cordless phone batteries please charge them for a minimum of 24 hours the very first time. Please also note that new batteries do not reach their full capacity until they have been in normal use for several days. If you have the BT3520 Twin, Trio or Quad handsets don't forget to increase the quantity you need if replacing all the batteries together.