Medusa Research's Battery Eliminator Circuits eliminate the need for a separate battery pack to run the receiver and servos by stepping down the voltage of the main battery. Smaller, secondary battery packs are a nuisance to maintain and charge, take up valuable space, and add weight to your model. Removing them through the use of a BEC frees up the space and weight, and reduces the number of failure-prone parts. The lack of low battery detection on secondary battery packs can result in receiver and servo failure without warning. Medusa Research BECs provide a solution to this problem by tying your receiver and servos into your primary battery. The 3.5 Amp BEC is specifically designed for larger models, and can handle input voltages up to 45 volts! The 3.5 Amp BEC is very light, weighing only 13 grams while a typical receiver and servo battery pack weighs approximately 90. The 3.5 Amp BEC is also very small at 30x50mm, but it requires a minimum input voltage of 8 volts so it is well suited for higher cell count battery packs. Medusa Research BECs save space in your model, can boost performance by improving your thrust to weight ratio, and are a cost effective alternative to secondary battery packs.