How to setup heating element to heat 2 gallons of water?
I have a thought on something that I'd love to build, but I'm having some trouble figuring out the best way to do it. I'm new to everything electricity, so please bare with me on my lack of knowledge on the subject.
What I'm building is a coffee maker that you can take with you as you leave the house. I need to figure out how to create a way to heat up the coffee to roughly 60-80 degrees, then once done you can detach it and take unit with you.
Now, here is the catch. I don't want to rely on the battery source to heat the water, ideally I'd be able to setup a removable plug that both charges the batteries and heats the element that gets the water up to 60 degrees while plugged in. Once the water is heated, I'd then like the ability to detach the cord, and you can take the coffee maker with you. The batteries at this point just need to keep the water warm/hot, not heat it from scratch.
Also, I'd like to figure out how to have a timer on this with an LCD screen. That way, just like with any coffee maker, you can set the time before you go to sleep and have it ready by the time you go on your commute.
Any help on how I should set this up, battery sizes, places that I can find parts I would need would be a gigantic help! I've been searching the internet for a few hours but cannot find anything.
Thanks in advance.