inputs.text: backup power two days constant use - wife brought droid razr last christmas two weeks stopped using went back old droid x pocket full spare removable batteriesi like check email use ebay read kindle app droid real battery draw fitness tracking program use gps time get work phone usually 7080 lunch toast not always around outlet work could not always sit phone chargerenter solution easypak nt70t use top phone recharge phone throughout day 45 battery top offs droid razr least 3 full charges top droid night nt70t gives backup power 3 four dayswhen nt70t gets two bars usually recharge takes 34 hours experiencefeatures automatic shutdown not use device fully charged huge another backup device would turn accidentally dead needed easy read led display tell much charge left capacity charge tablets smartphones different outlets comes built cables charging nt70t another charge devices size slightly thicker slightly smaller original droid xgreat purchase wont regret