I haven't been running electric very long. In my short time (about a month), I learned that getting a cheaper charger is a bad idea. When I asked my wife for the brushless revo for Christmas, I also included a combo pack of the traxxas dual id charger and 2 traxxas 3S lipos. Then, after she made the order, I read a lot of guys blowing out diffs/axles with the truck running 6S, so then I started investigating 2S packs instead.
For me, run time is paramount. I don't want to run for 10-15 minutes on a set of packs, so I tried to find the highest MAH that would fit in the truck. So far, the SMC 9000mah 2S lipo packs are as big as I have found that will fit. For the money, they are really good packs. Then, after a couple charge cycles with the traxxas charger, I got annoyed at the 2.5+ hour charge times for 2 packs and the fact that I had to reset the charger around the 1.5 hour mark because it has a time/mah limit that it stops at.
So now, I have bought 4
SMC 9000mah 2S packs ($55 a piece) and a
dynamite DYNC2050 4x100watt/4x10A charger (another $240 for it and the necessary adapters). I supposed I could have bought 2 dual 20A chargers, but the space I have for this isn't that big and this charger is capable of balance charging all 4 of the 9000mah 2S packs in a little over an hour. If I had gone with 2 20A chargers, I could probably cut that down to 30-40 minutes and charged at 2C vs 1C.
I did find a charger that does 200W x 4/20A x 4, but only on Chinese based websites... for $400.
As for the pack run time, when at the skate park, I get about 40-45 minutes on a set of packs. When at the park that is more wide open, I get 30-35 minutes on a set. So far, this is the only drawback to running electrics. I'm hoping heat/temp won't become an issue as well when it warms up out. I've been running nitro for 15+ years and I'm so used to running them nonstop for 2-3 hours at a time (just gas and go and refill while running), that I guess I didn't realize what it would take to satisfy my bashing needs. So, I may need to get 4 more packs before summer so I can go a few hours without stopping, regardless where I'm able to run. I only run at the skatepark when kids aren't there, which is rare, so I do run a lot at a few local parks that have natural/manmade hills for jumping and whatnot. Still, they are much more wide open and require a lot more speed for the jumps, so I'm on the throttle way more which mean shorter run times per set of packs.
I'm hoping I get at least a couple years of use out of these packs. Considering I usually would burn 3-4 gallons of nitro a year, that would be $75-$100 I'd spend on consumables (plus a few glow plugs here and there). The packs are $125 a set shipped ($15 shipping, not sure if that's what 4 would cost shipped or not). So, I'm into $250 of "consumables" already with electric. I also don't know how long brushless motors last. With the nitro engines I run and how I take care of them, I get 12+ gallons of running before they are tired and need replaced. Since I have 4 nitro rigs... that's a lot of years before any one engine wears out.
So far, the few things I like about electric has me already contemplating converting my savage to electric. The shear torque this thing has, the noise it doesn't make, the cleanliness of the rig and the plug in and go and the being able to run without fighting tune in the cold are all really great things about electric that I've quickly come to like.
Anyway, just sharing my thoughts and experience with it.