High-voltage (HV) servos can be operated directly from two-cell Lithium-based batteries (LiFe / LiIo / LiPo) with a nominal voltage of 6.7—7.4 V. In contrast, conventional servos are designed for a nominal voltage of 4.8 V, based on a battery technology (DEAC) which is more than fifty years old. This means that they must be protected from overloading by some form of voltage reducer* if Lithium batteries are used. This reduces the overall efficiency of the system, and leads to dissipated power, additional components and more connectors. LiXX batteries have a higher voltage curve, greater energy density and lower self-discharge rates than NiXX batteries. For a given power, if the voltage is higher, the current is lower.
Modern receivers are designed for voltages up to 9 V, and if HV servos are used, there is nothing to prevent modellers using modern, superior Lithium technology directly.
* For 4.8 V servos in a mixed system with 2S LiPo batteries - Servo-Voltage Regulator # 8 5066
Low-cost analogue servo, an excellent first choice in the field of High-Voltage servos
|Dimensions (L x W x H):||40 x 20 x 37 mm|
|Weight:||approx. 45 g|
|Torque @ 6 V / 7.4 V:||* 43 / 51 Ncm|
|Transit speed for 40° @ 6 V / 7.4 V:||* 0.11 / 0.09 sec|