Energy Research12V 20AH IP65 LiFePo4 Lithium Battery, Bluetooth with App

Ideal battery for depth sounders.

With the ER-Power Buddy app from Energy-Research, you can easily monitor your lithium battery. You can see the following:

The remaining capacity of your battery
The current consumption in amperes (when discharging or charging the battery)
The remaining sailing time/charging time
The temperature of the battery