The D100AB10 is a lithium ion replacement battery for the D100 series of PLCs, which are manufactured by Allen Bradley. The D100AB10 is a spare battery, which can be inserted in the D100 PLC. This battery provides the power for the D100 series PLC internal CMOS timer. The D100ED40 is a 3 Volt, 1200 mA lithium ion battery. It is to be used in the GE FANUC D100 Series PLC, as it is a single-cell lithium-Ion cell battery. The temperature considerations for the battery are the same as whichever D100 module that it is used alongside with it. However, the recommended temperature range for the D100ED40 does not exceed 85 degrees Celsius, or drop below -40 degrees. The dimensions of the D100AB10 spare battery are 17.27 x 33.53 millimeters.