Dom said:
I believe the rapid charger you have purchased is a parallel board charge which will NOT charge all three batteries at the same time. It will however, let you attach all three batteries to the board and them charge each of them at the normal charging rate. At least you don't have to keep changing out the batteries over and over. But please keep in mind that leaving lipo batteries unattended can be very dangerous. I hope this helps.
Uhmmm, yes it will. A parallel board will allow you to hook however many ports you have up to a single source. Think of it like a splitter.
Problem with this is that the current from the charger that used to get dumped into one pack now gets split up into however many batteries are hooked up to the board. You also have to be careful and ensure that the voltages of the packs you're trying to charge are within a couple tenths of each other to make sure that they charge up safely.
Let's use the factory charger for example. At its highest setting it will put out 3 amps. That 3 amps charges a single pack fairly quickly. Now, hook 3 packs into a parallel charging board and hook the board up to the factory charger set once again at 3 amps. It's going to take that 3 amp output and split it up evenly between the 3 packs. While it will work, it will make a full charge take three times as long.
As you said, you no longer have to switch out packs every hour, but now you have tripled your charging time.
One way to fix this is to get a charger capable of putting out more current. If you want to get that 3 pack parallel board setup back to the same time as the single pack hooked up to the factory charger, you're going to need a charger capable of putting out 9 amps.
I'm not sure what the OP's setup is, which is why we need more information like what brand and model charger he has, how many packs of what size he's trying to charge, and if he's using some sort of parallel charging board.