on a 75 amp hour battery and u saying in your first post u have an amp draw of between 0.13 to 0.20 amps which is high!. The worst case on 0.20 on a 75amp hour battery it would take 15 day for that 0.20 to drain that battery if it was a good battery (75 / 0.20 = 375hours / 24 hours = about 15 days)