The sender has a smaller display screen and will last about 36 hours of continuous use in a dim environment with the backlight display on the whole time. We tested with the worst case scenario. The display unit will be good for about 24 hours continuous operation with the backlight on.

Every unit comes with a really nice USB charging cord that attaches magnetically. The unit itself has a standard micro-usb connector (think Android phones) so you can use any cord if you remove the magnetic adapter. Just pull straight up on it and you'll see the familiar port and can use any micro-usb cable you like.

No, do you know someone with the skill and desire to steal your flow test readings? It would be easier for them to do their own test. Pressure reader units only communicate directly with each other. They do not connect to the internet or any other radio link networks.