DieHard 27582 SLA unverified capacity function

Sears sells the DieHard model 27582 marine (deep cycle) battery for $130 (excluding core deposit). This is probably the cheapest chemical (Sealed Lead Acid or SLA) battery in its size range on the market in terms of initial cost ($ per Peukert capacity).  The 27582's total power output is not obvious, given that SLA discharge efficiency varies depending on instantaneous output current, significantly affecting the runtime between charges. The Peukert capacity C is defined as the total amp-...

ETQ TG1200: Preliminary Fuel Consumption Measurements

Unlike chemical batteries, gasoline generators consume a minimum amount of fuel even at zero current draw. [The battery equivalent is the inverter idle current, but this is typically only a few watts.] To a first approximation, internal combustion generator fuel consumption (liters per hr, c) as a function of energy output (kW, w) is linear [c(w) = pw + i], where the power-proportional consumption (p) and idle consumption (i) tend to be inversely proportional.  Manufacturers usually advertise on...