If your phone turns off after closing hen then the battery ran out, when you close hen, bme is started again, and if that finds the battery low it will shutdown the device, I'm assuming you didn't read the help screen, the battery meter is not updated when bme is off. Also, don't blame hen for your slow device, we made a lot of tests on it and it does not increase load on the CPU at all, nor does it risk damaging your device, but I'd like to thank a certain member for spreading ******** (BS if it gets censored) about it.