Yes, the properties of a rechargeable NiMH correspond in voltage and discharge rate to other batteries. However for smoke detectors and gas leaks detectors it has been noted that as the voltage of NiMH batteries drops very fast as they “die”, the detector will run out of energy shortly after it gives the warning signal of failing battery. In this instance, we recommend using our Alkaline Xtralife or MAX batteries. Their long discharge time combined with a slow voltage drop as the battery “dies” make them suitable for smoke detectors: lasting a long time and the warning signal will last longer than for rechargeable batteries.