I do a lot of travel with my job. Because of this I travel though areas that have spotty cell service. This spotty service creates a lot wear on my battery. The "Motorola Battery Li-Ion Extended and Dark Pearl Gray Door (K1m)" almost triples my standby and talk time. I charge up less and also found the hump-back of the battery more comfortable when talking.This battery has extended the life of the cellphone and not my contract from buying yet another cell phone.cg