Yep, some chinese company knocking out the chargers, as above the options will be charge rate, do you need to charge at more than 5amps (charge at 1C so 5000mA lipo @ 5amps), 12v, 230v or both, Balance charge option (must I think) then its how much you want to pay and get some cables with it, connectors can vari. (you can charge 6500's at 5amps just takes a bit longer)
We can run all day on one lipo, top up between rounds, the lipo's stand that with no problems, don't let the voltage fall to low or use until flat, (modern esc have a cutoff), don't leave in the car connected even with the switch off.
much easier than a box load of cells that needed discharging/equi/recharge/cyclewhathaveyou..... I still have a Turbo 35
Brushless is also a must, fit and forget motors.
Visit a local club see what they are using, enjoy