A battery warning is given when the battery capacity is reduced to a minimum. The LED flashes red along with a beep every time a button is pressed, to indicate the need to replace the batteries. In addition, after entering a correct code, the LED flashes red along with a beep five times to accentuate the need to replace the batteries.

Battery lifetime depends upon several parameters such as battery quality, frequency of operation for example. With normal usage the batteries will last for several years. The product is supplied with GP batteries. It is recommended to use batteries of a well-known make for best performance.

If the battery capacity is below minimum, the handle will not respond at all.