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ContinuousWave: Small Boat Electrical
Powering VHF Radio With Small Battery
|Author||Topic: Powering VHF Radio With Small Battery|
posted 04-10-2012 10:51 PM ET (US)
In thinking of the different things that may go wrong out there, a dual battery setup sounds like it may help in case of engine electrical failure and drainage of one battery. One may be able to use the second battery to use the VHF to summon help.
I have a single battery and don't really have space in the smaller Carolina Skiff console for a second battery.
What is the smallest 12v rechargeable battery I can keep on board to connect to the VHF in needed?
posted 04-10-2012 11:37 PM ET (US)
A VHF Marine Band radio is a 25-watt transmitter. Most of them only draw about 7-amperes on transmit. You can run such a radio with almost any small lead-acid storage battery. A 12-Volt lead-acid motorcycle battery would have a suitable form factor. I don't know the designators of those small form factor batteries.
posted 04-11-2012 10:24 AM ET (US)
Perhaps a home alarm system fully sealed battery would serve. Radio Shack sells them for an outrageous price but mine seems to last at least five years. My gate opener uses the same battery and I seem to get about four years out the battery in that much greater load and outdoor environment.
posted 04-11-2012 11:14 AM ET (US)
Thank you for the input Jim and Butch.
Butch, four years without any recharging?
posted 04-11-2012 07:56 PM ET (US)
The systems provide a constant trickle charge to the batteries.
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