Hello,
I have noticed that the battery will drain even if the MIFI is off. I get it charged, turn it off and a few days later I would turn it on and the battery is dead.
MiFi’s battery will discharge slightly even you didn’t turn it on. But generally it will discharge in 1 to 3 months.
In Mudi E750 we improved the design and the battery almost do not discharge .
Now I know why the battery drains, it is defective! I am very unhappy with this unit, nothing but problems battery swollen 2|690x391
I have directed you to customer service.