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Small rectangular lithium-polymer battery with wires, 29 by 22 by 8 millimetres, silver-grey finish

FYIOGXG Replacement Battery 400mAh 3.7V for ET-300-L ET-302 ET-402Receiver

SKU CH-D0FN-1ZT79

400 mAh 3.7 V lithium-polymer replacement cell fits ET-300-L, ET-302 and ET-402 receivers and transmitters

  • Battery pack size29.1 × 22.1 × 8.1
  • Battery typeLithium polymer
  • Battery capacity400 mAh
  • Battery voltage rating3.7 V
  • Details29.1 × 22.1 × 8.1
  • Product typeLithium polymer
  • 400 mAh capacity powers compatible dog-collar units
  • 7 V lithium-polymer cell matches original voltage
  • 10 × 22.10 × 8.10 mm size fits ET-300-L, ET-302, ET-402 receivers
  • ISO 9001, RoHS and CE certified for safety compliance
  • 8 g lightweight pack with overcharge, over-discharge and short-circuit protection

Compatible Replacement Battery

This 400mAh 3.7V lithium polymer cell replaces the original power source for ET-300-L, ET-302 and ET-402 receiver or transmitter units. It matches the factory dimensions of 29.10 x 22.10 x 8.10mm and weighs 8.8g. The integrated protection circuit guards against overcharge, over-discharge, over-voltage and short circuits. It suits owners of compatible dog training collars needing a direct swap.

Sustained Operation

The 1.48Wh capacity supports typical training sessions between charges. A fresh cell reaches its best runtime after two or three full charge and discharge cycles. Protection circuitry maintains stable output during continuous use and prevents damage from deep discharge. Avoid low-quality third-party chargers, which can reduce overall service life.

Upgrade Considerations

This part replaces batteries identified by part numbers PL-762229 or V2015-E05. The jump is worth it when the original cell no longer holds sufficient charge or shows swelling. It is not for devices outside the listed ET model range or for applications requiring a different voltage or connector layout. Do not disassemble, expose to fire or water, or store above 60°C.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $10.99
Typical for this category: the median of 10,440 items is $10.99.

Specifications

Product
Brand nameFYIOGXG
Model nameReplacement battery
Product typeLithium polymer
Power
Battery typeLithium polymer
Battery capacity400 mAh
Battery voltage rating3.7 V
In the box
Battery pack size29.1 × 22.1 × 8.1

Questions about this item

How much heat does the 3.7 V 400 mAh lithium-polymer cell generate during all-day use in a dog collar?

The 400 mAh 3.7 V lithium-polymer cell weighs 8.8 g and is rated at 1.48 Wh, so normal collar operation produces only mild warmth well within the 60 °C storage limit.

What connector or charger must I already own to install and charge this battery?

The replacement uses the original device connector; you need the factory charger that came with the ET-300-L, ET-302 or ET-402 receiver — avoid low-quality third-party adapters.

Will this 29.10 × 22.10 × 8.10 mm pack fit my older ET-300-L transmitter without modification?

Yes, the pack matches the original dimensions and part numbers PL-762229 and V2015-E05, so it slides into the ET-300-L, ET-302 and ET-402 housings directly.

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