since now i have 2 erevos i have quite a few batteries now.what i need to know is what is the best battery charger to charge multiple batteries.i have 4 traxxas 3s 5000mah 25c's 2 venom 5000 mah 35c's 2 traxxas 2s 7600 mah 25c's and 2 spc 8200 mah 30c's i'd like a charger that i can charge atleast a set at the same time if not 4 at the same time.thank you in advance for your help