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APPENDIX G. BATTERY CONSIDERATIONS
The Creative Electronics ELT 1091A tester utilizes 8 AA cell batteries for power. The tester
draws approximately 230 Ma when in use. Tests were made to determine the economics and
life of the batteries using Alkaline and Lithium batteries with the following results. All tests
were made using a 230 Ma load for a continuous period of time until the battery dropped
below the minimum voltage (10 volts) needed to maintain the accuracy of the tester. The
Alkaline batteries took 3 ½ hours to fall below 10 volts, The Lithium batteries took 12 hours to
fall below 10 volts. Therefore the Lithium batteries outlasted the alkaline batteries by more
than 3 times. The Creative Electronics ELT tester incorporates a battery condition monitoring
function based on measuring the current battery voltage and converting it into an approximate
battery life value. Most batteries will recover some charge when not in use for a short period
of time. Once used again this charge is dissipated rapidly and after a short time will level off.
This will be evidenced by an initial rapid decrease of the battery state which will eventually
become more stable as the battery is used and is both normal and not to be of any alarm or
concern. When the level reaches 0% battery life, the tester will become disabled and a
message to replace the batteries will be displayed. Turning the tester off for a short period of
time will allow the battery to recover some charge and may allow an additional test or two with
the current batteries.
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