Mackwell 4Ah Nickel Metal Hydride (NiMH) cells offer equal charge capacity to 4Ah ‘D Type’ Nickel Cadmium cells, but in a smaller package, enabling them to be used in smaller spaces.

They are available in both side-by-side and stick formats and provide 4-years life as required by BS EN60598- 2-22 and ICEL 1001, when operated within the temperature ranges specified below.

If the temperature ranges are exceeded, performance and operational life of the cells will be reduced.

The batteries are supplied with tag connections and ‘flying lead’ black and red wire assembly to allow simple push in connection to our emergency modules.

We recommend a maximum storage time of three years at an ambient temperature of 25°C. If this is exceeded it will be necessary to complete three charge / discharge cycles to restore full working capacity.

If you use a battery pack not supplied by Mackwell, you should ensure that it is correctly rated for the application.

Batteries must be securely fixed either by their provided fixing points or end caps as supplied