From Savox:
For new plus series we had to upgrade the motor and the new SW-0231MG+ is a HV servo which accepts 7.4V.
The new specs are below:
6V 0.17sec , 20kg/277.7Oz
7.4V 0.15sec , 25kg/347.2Oz
Fully Waterproof, passed IP67 tested
Please contact with SAVOX distributors for new plus series SW-0231MG+.
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