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Rectangular lithium-polymer battery pack, matte finish, 79 by 39.7 by 16 mm

Cameron Sino G-4000 2750mAh 20.35Wh battery for FrSky Ethos Tandem X18 X20 transmitters

SKU CH-EY6V-5DY1N

2750 mAh lithium-polymer replacement battery fits FrSky Ethos Tandem X18, X20 and SE transmitters

  • Battery Capacity2750mAh / 20.35Wh
  • Capacity2750mAh / 20.35Wh
  • Weight156
  • 2750mAh capacity powers extended FrSky transmitter sessions
  • 4V 20.35Wh lithium-polymer cell matches original voltage spec
  • 00 x 39.70 x 16.00mm form factor fits Ethos Tandem X18, X20 and SE models
  • Built-in protection guards against overcharge, over-discharge and short circuits
  • ISO9001, RoHS and CE certified for safety compliance

Direct replacement for FrSky transmitters

The Cameron Sino G-4000 lithium-polymer pack delivers 2750mAh at 7.4V, matching the original FrSky part number for the Ethos Tandem X18, X18SE, X20, X20S, X18 XE and X20 XE radios. It restores factory runtime for pilots who fly indoors or outdoors.

Compact cell with decoded chip

The 79.00 x 39.70 x 16.00mm brick weighs 106.0g and slots into the transmitter bay without modification. A fully decoded chip communicates with the radio's fuel gauge, while built-in protection guards against overcharge, over-discharge, over-voltage and short circuits.

Shock-absorbing foam and cycle guidance

The single battery ships in protective foam that cushions the cell during transport. The manufacturer advises two to three full charge-discharge cycles before regular use and warns against low-quality third-party chargers that can shorten service life.

Highlights

  • 2750mAh capacity powers extended FrSky transmitter sessions
  • 4V 20.35Wh lithium-polymer cell matches original voltage spec
  • 00 x 39.70 x 16.00mm form factor fits Ethos Tandem X18, X20 and SE models
  • Built-in protection guards against overcharge, over-discharge and short circuits
  • ISO9001, RoHS and CE certified for safety compliance

Specifications

BrandCameron Sino
Model NumberG-4000
Battery Capacity2750mAh / 20.35Wh
Capacity2750mAh / 20.35Wh
Weight156

Questions about this item

What voltage does the 7.4 V lithium-polymer pack deliver to the transmitter?

The pack is rated at 7.4 V and 2750 mAh, giving 20.35 Wh of usable energy for the FrSky Ethos Tandem X18, X18SE, X20, X20 XE, X20S, X18 SE, X18 XE, X20 and X20s transmitters.

Will the 79.00 × 39.70 × 16.00 mm case fit the battery compartment of my FrSky Ethos Tandem X20?

Yes, the dimensions match the original G-4000 pack, so it slides into the X20, X20s, X20 XE, X18, X18SE, X18 SE and X18 XE compartments without modification.

How do I install the replacement pack and what is the common mistake?

Open the battery cover, unplug the original connector, attach the new pack’s JST plug ensuring the polarity matches, then close the cover; the step often missed is fully seating the connector until it clicks.

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