What do you guys use for an inexpensive 12 Volt battery for your starter?? Is there another type of battery that I can get from a junk yard or somewhere??

Good
http://www2.towerhobbies.com/cgi-bin...&I=LXL370&P=ML
OK
http://www2.towerhobbies.com/cgi-bin...&I=LXSK07&P=ML
You should be able to find an equivelant at a well stocked hobby shop
Add another $10 or so for a charger unless you have one already that is capable of charging 12 volts at at least 250 mah or better.(you will need a charger even if you buy junk from a junk yard)

if you are lucky enough to know someone that does building maintenance the emergency exit signs use the same rechargeable 12 volt battery's we use,they change them out every year at my work and i can usually get a few of those,they last a good while,also the backup battery's for telephone systems use the same battery's,you can buy them in most hardware stores though for the same price that was quoted here usually $10 or so.

I use a sealed lead-acid battery made for lawn mowers that is $19 at Wal-mart. It weighs a bit more but will give some great cranking power for your starter. Plus, I only have to charge it a few times a year.

Ken

Another source is folks who service security systems. The battery back-ups are changed regularly and you might be able to get them FREE so they don't have to pay the disposal fee!

flian'

Your local Fire Alarm Company is another source for the batteries. The batteries in the fire alarm panels are required to be changed out every 4 years. There is nothing wrong with the bulk of these batteries and they will last for years in the RC world. In my flight box I have a 12 volt 7.5 amp hour battery. To use my quick charger I have a 12 volt 18 amp hr battery. I have a cheap Hobbico charger that keeps them charged up. You will also find that even if the batteries do go bad, they make excellent weights for gluing on those doublers. Good Luck, Dave

I use a tractor battery. A little heavy, but they are cheap, last for many years and provide a whole lot of cranking amps for the starter. I charge at 1A overnight about once a month.

I use the batteries from old UPS's, uninteruptable power supplies. I only charge them 2 times a year, using a motorcycle trickle charger overnight.
I use my old "D" cells from my Maglight flashlight to run the glo plug. If I don't let them freeze in the winter, I can get 2 years from them before I throw them out. Just put them in parallel, 3 or 4 old batteries will do the trick.

I just have a regular deep cycle lead acid motorcycle battery. I bought it at an IFA country store for about $20. Its nice because it only needs a recharge a few times a year.

I use a pair of 6 cell nicad car packs in series. About 1500 mAh is common, cheap and available at any LHS. Gives enough power to start up to 1.20 size engine and is light weight. Mine are attached to the starter, gives around 12 to 14 volts to the started, depending on load.

Lead acid also give good cranking power, but somewhat heavy and need to be upright.

Gel cells are about the worse, with high internal resistance. Ok for smaller engines, but they don't seem to last very long.