Marcum,Vexilar, Hummingbird flasher batteries???

I currently have a Hummingbird Ice 55. I have some questions about batteries and how big one can go without damaging or running into problems. My question is can I use a 12V 18ah in my flasher? I’ve checked online and the biggest battery I’ve seen used was a 12V 10ah. The Reason I ask is because I have 3 brand new 12V 18ah batteries from our security system that I would like to use. Also what kind of charger do these 18ah batteries need? Would I be able to use my original hummingbird charger or is it not strong enough to get charge on that size battery. Again, I just don’t want to damage anything… This has probably been covered or talked about before in previous topics, but any help I can get would be greatly appreciated.

They’ll work just fine and should last 1.8 times longer than your original. You won’t damage anything. Your charger should work ok too but it’ll take longer to recharge a battery if it’s low. The Humminbird charger puts out 1000mA so if your original battery was completely dead, it’d take 10 hours to fully charge it while an 18ah battery would take 18 hours to charge fully if it were completely dead. That’s really the only difference you should notice.

It should run just fine. The batteries in question just have more juice in them. your only hiccup will be if they fit with the supplied straps into the HB housing, you may need to make longer ones.

Your HB charger will charge them just fine, it will just take about twice as long as your smaller batteries.

Agree with above. Regardless of the amp hours, still just a 12v battery. I can the little batteries that Come with stuff and run all 12 to 14ah batteries. Like you, I have access to batteries through a friend that does security systems. Heavier battery, but I Get Many days out a charge

Think of it like a larger gas tank hooked up to the same engine. As long as you have the same voltage it just gives you more capacity.

Awesome, Thank you guys for taking the time to answer my question. Sounds like charging will just take longer. Thanks again!

you could hook it up to a 100+ amp hour deep cycle if you really wanted to! 12v is 12v.