So the key difference between a Lead/Acid Charger and lithium are not super significant, but enough difference that we can't recommend Lead/Acid for Lithium for a few conservative safety reasons. For example if a Lithium Battery is severely over discharged into say the 6v~8v range ow lower, at these low voltages it DOES NOT like a fast charge. At these lower voltages it can cause the lithium cells to over-heat if they subjected to a higher voltage and amperage charging being pushed into them (like a lead/acid charger would do). In the worst case scenario this fast charging at low voltages can cause Thermal Runaway where the Lithium Battery melts down. So a Lithium specific Charger's profile will gently massage a Lithium Battery back up to higher voltage and to a point where lithium can then take a fast charge again.. usually about 10.5v to 11v then go into regular charging. But a Lead/Acid charger profile does not consider this and usually just puts the charging rate at a higher voltage and amperage right off the bat, so this can cause a thermal runaway incident with certain chargers and depending how low the lithium battery is on voltage. So also this can happen with Jump Starting or Bump Starting a Lithium Battery that is say at 6~8v or below in your motorcycle then you jump start the bike and it starts charging at a higher voltage and amp rate not knowing the Lithium Battery is severely discharged. This can happen on the earlier NON-PROTECTED versions of these Lithium Batteries. Our RE-START battery will not allow the Battery to get to a point of server over-discharge so this type of incident can't really happen to a RE-START battery since they have a low-voltage cut-off to prevent a severe over-discharge. But the other issue is that Lead/ACid battery Chargers often, "cycle" the battery continually at the end of the charging cycle... meaning the cheap trickle chargers like battery tender jr's just keep trying to charge the battery and lithium does not like that either. A lithium charger will stop the continual end of charge cycle charging that a Lead/Acid Charger does. A lead acid charger usually charges more because Lead/Acid has a property of "self-discharge" ... so the battery actually will discharge quite fast due to the chemical reaction between lead and acid. Whereas Lithium will not self-discharge but a very tiny amount per month (unless the vehicle has a drain on it). So anyway in the long run we just want the Lithium to be charged by the correct charger to get the longest , safest life without an extraneous issue coming into play like a charger that was not intended for it. Worst case scenario you could put a lead/acid charger on a Lithium Battery for 15 minutes if it is above 10.5v and just needs a little bump to get the battery going and starting a bike. But we don't even like saying that because people may forget and leave it on and potentially ruin their battery. So we always say "use a Lithium Charger". As far as the Cycle Electric. I am not necessarily familiar with that model. They should be able to recommend if it is compatible with Lithium. We have not tested it. It should not be charging above 14.6v. So I'm sorry I could not give more input on this. In general most stock and quality after market systems will work. And the problem with OLDER R/R is that these pre-1990 Voltage regulators are damaged by now, and mainly the only bikes we have issues with are the older Japanese bikes people are turining into Bobbers and such, and the older Harleys that people Customize. These 25-30 year old voltage regulator are toast and sending out 25v to the battery sometimes.. and that can easily cause the Thermal Runaway condition I speak of ..... add to that these guys are usually using our SMALL CASE models that do not have the protections of the RE-START Models we sell. So our Users Manuals go in depth into that because there are so many modifying these older bikes and not knowing the voltage regulartor is bad.