Hey guys. I'm in the final stages of my build and need to decide on which type of battery to go with so I can build my tray and locate it where it needs to be. Now here's my problem. I'm not on the up and up when it comes to electrical systems. Iv got a 1970 shovel with a cycle electric 22 amp alt/ regulator/rectifier. It's not the original part that is called for the motor. It's the kit for the 80's shovels if that makes any difference. Iv got dyna S ignition. Headlight and tail light with switch to shut them off while starting. Now I emailed ballistic for advice on a battery. He said the 4 cell would work fine for me but I needed the modern charging system for a lithium battery. What is considered modern? If I have to go agm route that's fine. I'll just get one of the battery's for emergency exit signs and what not that's about 1.3-2.5 amp hr. So my question is which would work the best for me for my charging system or will the lithium even work at all? And is the amp hr. On the agm battery even an issue with my charging system? Just need the smallest battery possible so I can tuck it away on my frame. Any advice will be appreciated. Thanks