Minn Kota Digital Battery Meter - $19.99

Nothing is more aggravating than running out of power on the water just when the fishing is hitting its peak. You'll have no worries about that with this helpful Digital Battery Meter. The LCD shows the voltage level of any 12-volt battery and the state of the charge remaining is indicated by four color- coded lights. Its compact design means you can keep it handy or store it easily. - $19.99