ok so the idea is a new recipe for an existing battery and a new kind of battery.
first is making signal use battery's from copper wire and gunpowder. the logic being gunpowder is made from the same ingredients as the dry single use batter recipe it would work out to 1 gunpowder equals 5-10 single use batteries
second is the melon battery. a shapeless recipe that uses a melon block a gold cable and a hv cable. why iron and gold? cause unlike copper and tin you can grow iron and gold. to be used the melon battery would have to be placed like a block and connected to the EUnet (output on all sides). it would generate 5000 to 10000 eu at 5eu/t as the power is used up the block would turn grayer breaking it or hitting it with a wrench will destroy it with no drops. or the melon battery can be thrown in a crop analyzer where it will have just enough energy to process a seed bag all the way through.
note: all numbers are subject to change with constructive criticism
p.s. can some one direct me to a good way to display recipes on the forum?
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first of you did ok on presenting your idea, however gunpowder does not seem like a good idea. sounds more like your trying to make "Metal-Storm" ammunition then a battery, lol. also 1 gunpowder it equal to 1 coal dust and 1.25 redstone dust. which would make it alittle more expensive in the end.
also a "lemon battery"? first off how are you "growing" iron and gold? if your refering to harvesting via Mob drops then it's faster just to go dig for gold or use UUM to make gold. also you cannot harvest Melon Blocks cause when you destroy them you get melon slices, unless maybe you use silk touch, not sure about that one. also their used to be Lemon Batteries LONG LONG ago like in ancient egypt using Lemon juice and a copper tube and some other stuff, but the basic concept was the copper used the acidity and high PH to create energy from the reactive hydrogen in the lemon juice, this produced about as much as a AA battery in real life for every 20 "1 gallon" lemon batteries. so it seems alittle over exaggerated if you could even harvest the melon blocks in the first place.
the only alternative is basically you place an uninsulated Copper Cable ontop of a grown Melon and it would turn into a Melon Battery, like how you make snow golems, that would instantly and basically contain 10,000EUs at .25EU/t for a small instant "renewable" resource that you can use for small amount of power near the start of the game. maybe this could be inplimented into the Crop Analyzer system to make and grow more acidic Melon's for stronger batteries, like one that would contain 2million EUs and output at 32eu/t? this would alteast be a significant reward for growing crops up to the higher tiers