Ellipsis jetpack battery


Jetpack battery won't stay charged.  Took Jetpack to local Verizon store.  The assistant advised that the battery was not good and I went to battery store.  There I was told that the jetpack connector was not good and the battery was not bad.  Went back to Verizon store and I received a replacement jetpack.  Battery charged a little.  Two days later the light on the jetpack is red (I have it plugged in to electric source) but I do have connectivity.  If it is the battery that is bad, where can I purchase a new one.  I looked on internet and could not find one.