While many mods intended to keep track of an ECM's battery life have come around, almost all of them have been interface-based, which means they're prone to breaking after an update and/or don't mesh well with custom HUDs. This mod will cause your heister to announce vocally (saying something like "only a few seconds left") when your ECM has reached its low battery state so that you no longer have to be looking at the ECM to know when you should place another one. Additionally, the amount of time left at which the ECM will reach low battery state can be tweaked in the lua mod options menu. The combination of the two should keep your ECM rushes pretty efficient.