Went out today to price gel batteries ......Holy C$£% they are expensive . When suppling power to a LX200 its recommended to use a seperate source for accessories . My dew heater makes a quick meal of a 17amp powertank {3hrs} so to save myself from dew invasion and have the laptop out in the feild i need another power source. Quickly changed my mind about a gel battery {350 for a 55amp} and got a sealed 35 amp sealed lead acid one {95}, the kind used for golf buggies etc . Hopefully this gives me some more time out under the stars , got a maintence free charger that monitors the rechargeing . At supercheap they have Battery boxes with wires and plug outlets but i was thinking of building one with a space for a inverter and the charger , anyone have experiance hooking up something similar ?