MyFishFinder.com Just like iceshanty but warmer
I use a NOCO genious, Works great with all batteries.
It is not unusual for a charger and/or battery to heat up when charging. My laptop charger gets very warm. What kind of battery do you have? Sealed Lead Acid (SLA) or some sort of Lithium (Li)? It is best to use a charger that is made for the specific type of battery, especially lithium (Amped Outdoors, Dakota, etc.).
Standard vexilar charger that came with my unit. Trouble free for years, but to old school for many