I take this Duracell Procell batteries for many years for our smoke detectors. Of this we have six of them and the fact they keep minimum 1.5 years until the first smoke detector has a battery with low charge reports and we renew all. So far, no battery expired or had used any stress at. The plus pole is secured with a rubber cap to prevent accidental short circuits. The delivery today received until March 2017 storable and with about 1 per battery attractively priced.
