Typically the AH rating is based on a 20 hour discharge rate. Therefore, a 100 AH rated battery can deliver 5 amps for 20 hrs (5 amps x 20 hours = 100 AH) before the battery voltage drops below 10.5 volts. At discharge rates less than the 20 hour rate (0.83 amps in your case) the battery AH rating will increase slightly.
However: Discharging your battery to the AH rated level (10.5 volts) will result in greatly reduced life. The chart I have for Interstate deep cycle batteries indicates a life of 2200 cycles to 25% discharge (12.45 volts), 1000 cycles to a 50% discharge (12.25 volts) and 325 cycles to 100% discharge (11.9 volts).
In conclusion: Using your battery for 5 days between charging will result in greatly reduced life.
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Today's Featured Article - Tractor Profile: Farmall M - by Staff. H so that mountable implements were interchaneable. The Farmall M was most popular with large-acreage row-crop farmers. It was powered by either a high-compression gas engine or a distillate version with lower compression. Options included the Lift-All hydraulic system, a belt pulley, PTO, rubber tires, starter, lights and a swinging drawbar. It could be ordered in the high-crop, wide-front or tricycle configurations. The high-crop version was called a Model MV.
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