Readytosky 20A 2-4S Mini BLHeli-S OPTO ESC for FPV Race RC Helicopter


In stock

SKU: 674151
  1. Model:20A BLHeli-S OPTO ESC
  2. Suitable Lipo Batteries:2 ~ 4S
  3. Continuous current:20A
  4. Peak Current(10s):25A


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New Price: ₹ 649

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Brand: ReadytoSky
Category: (ESC) Drone Speed Controller
Tags: ESC, Electronic speed controller

If you are wandering to build a drone and don’t know what will be the best ESC for you then worry no more, we have got your back. At Robu, we have everything for you to get started with your drone project.

Readytosky 20A 2-4S Mini BLHeli-S OPTO ESC for FPV Race RC Helicopter used mainly for FPV Race RC Helicopter with great functional and high-performance and the max working frequency will be 50MHz. Built-in automatic protection of temperature sensor and this ESC is compatible with a 2-4S  lipo battery.

The ESC support BLHeli-S firmware Can easily upgrade the firmware or parameter online, also support all functions of Blheli_S. It can be programmed to set up the throttle etc. It also supports two-way mode and FPV 3D mode.


Vehicles & Remote Control Toys

For more 20A ESC’s, Click here

Related Article:



  1. Firmware: Blheli_S
  2. Wide Compatibility
  3. Lipo:2-4s
  4. Support the newest protocol of Dshot150/300/600
  5. Support PWM, Oneshot125, Oneshot42
  6. smaller size, lighter weight, and easy to build
  7. Stable performance
  8. support two-way mode and FPV 3D mode
  9. Built-in automatic protection of temperature sensor

Package Includes:

1  x 20A 2-4S Mini BLHeli-S OPTO ESC for FPV Race RC Helicopter


Suitable Lipo Batteries

2 ~ 4S

Board size


Continuous current


Peak Current(10s)


Dimensions (LxWxH) mm


Weight (g):


Shipping Weight 0.012 kg
Shipping Dimensions 4 × 2 × 1 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects. Replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

Questions and answers of the customers

  1. 0 votes
    Q Can we use it for ZMR250 with 2205 2300KV Motors answer now
    Asked by pratikpanda24 on April 20, 2021 9:31 pm

    Yes, you can use this with 2205 2300KV Motors Read more

  2. 0 votes
    Answered by the admin

    Yes, it is compatible.

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Country Of Origin: China