Capacity at a Glance: 720mAh vs 300mAh
The main difference between the LiPo 3.7V 720mAh Battery and the LiPo 3.7V 300mAh Battery is their capacity. The 720mAh battery stores more than double the energy of the 300mAh version, which translates to longer run time between charges for your e-collar transmitter or receiver. Both are 3.7V lithium polymer cells and cost the same catalog price of $5.25, making the 720mAh the higher-value option if your device can physically accommodate it.
Product Facts: LiPo 3.7V Batteries
- LiPo 3.7V 720mah Battery: LiPo 3.7V 720mah Battery priced at $5.25 (catalog comparison price $10.50). This price matches the 300mAh version, so you get more capacity for the same cost.

LiPo 3.7V 720mah Battery - LiPo 3.7V 300mAH Battery: LiPo 3.7V 300mAH Battery priced at $5.25 (catalog comparison price $10.50). The 300mAh battery is a smaller capacity option, suitable for devices where space or weight is a constraint.

LiPo 3.7V 300mAH Battery
Choosing the Right Capacity for Your E-Collar
If your e-collar transmitter or receiver has a battery compartment that fits the larger 720mAh cell, it will give you longer usage between charges—useful for long training sessions or multi-day outings. The 300mAh battery is lighter and more compact, which may be preferable for smaller receivers or collars where a snug fit is important. Neither battery's specifications include exact dimensions, so check your device's battery compartment or consult the collar's manual before ordering.
Important Shipping Restrictions for Lithium Batteries
Both the 720mAh and 300mAh LiPo batteries are subject to the same shipping restrictions. Standalone lithium batteries are prohibited as cargo on air transport within the United States, following ICAO and PHMSA regulations. This means these batteries can only be shipped via ground methods. Plan ahead for longer delivery times and check with E-Collar Technologies for current shipping options.
What the Supplied Information Does Not Cover
The catalog records do not include physical dimensions, connector type, or specific compatibility with individual e-collar models for either battery. While the product names list them for transmitter or receiver use, the exact fit depends on your device. If you are unsure whether the 720mAh or 300mAh battery fits your collar, measure the existing battery compartment or refer to your collar's documentation. The same shipping restrictions apply to both, so ground shipping is required regardless of capacity.


