EPD/HB/40521/000
ISSUE 5
EPD TECHNICAL HANDBOOK Page 79
6.2 The EPD Battery
The EPD can use either a Lithium Thionyl Chloride (LTC) 3.6 V battery or a standard
1.5 V AA battery (see Section 4.2). A battery change is within the scope of any
competent user. However, care must be taken when replacing the EPD battery (see
Section 6.2.3).
If the EPD is to be stored for a prolonged period of time the EPD battery should be
removed. There is no definitive battery installation period. The best philosophy to
adopt is: if in doubt - remove the battery.
6.2.1 Replacement Batteries
Replacement batteries must be suitable for installation into the EPD. On no account
must excessive force be used to insert the battery into its compartment. The
following are recommended replacement batteries:
Saft - Lithium 3.6 V (LS 14500)
Sonnenschien - Lithium 3.6 V (SL-760)
Duracell/Procell - Alkaline 1.5 V (MN 1500)
Other AA batteries may be suitable, however the user is advised that:
1. The length of the battery including the battery anode (pip) should be in the
range of 49.0 mm to 51.0 mm.
2. The diameter of the battery should be in the range of 13.9 mm to
14.6 mm.
3. The diameter of the anode pip should be less than 5.7 mm. The battery
compartment has a feature to prevent reverse connection of the battery, and
an anode pip of more than 5.7mm diameter may fail to connect.
4. Battery life may differ from specification.
Detailed procedures for inserting/replacing the EPD are given in Section 2.1.2.
6.2.2 Battery Leakage
Batteries that become expended should not be left in the EPD as they may leak,
especially LTC batteries. Batteries should also be removed from any EPD that is
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