Apparently Riden has now released their 24 amp power supply, so for approximately $173 you can get a 24 amp supply that works for top balancing as well as pack charging. That's a pretty good deal. I haven't tried the 24 amp version yet, but the 12 and 18 amp versions are very reliable and easy to use. I highly recommend them.It seems to me that this process takes so long because us DIY guys can only afford low voltage/low amperage power supplies. If we could buy a low voltage, high amperage power supply then the process would be much faster.