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Old Apr 15, 2013, 10:47 PM
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matt99's Avatar
United States, KY, Henderson
Joined Jul 2012
156 Posts
Battery for a Mister Darby

Hey guys, I Recently purchased a Darby and need some help choosing the right battery for it. should i run it on 12 or 6 volt what battery type
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Old Apr 15, 2013, 10:54 PM
Keep a Steady Strain....
capntroy's Avatar
Orange County, CA
Joined Nov 2007
1,353 Posts
The simple answer is to put as much battery in as possible given your available space and displacement. In a Darby, a 12volt 25ah battery wouldn't be out of place at all.

I'd avoid the wet cell batteries and go with a sealed lead acid or equivalent...
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Old Apr 16, 2013, 12:17 AM
Grumpa Tom
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United States, CA, Los Angeles
Joined Sep 2003
24,276 Posts
Oh man, that's a nice one.
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Old Apr 16, 2013, 02:57 AM
Registered User
Blackpool, Lancs
Joined Feb 2006
3,072 Posts
First you need to figure out what the motors and other items need. That will tell you whether to go 6 or 12. Then work out the biggest you can carry in the space available. As said before, avoid wet automotive types - they are inclined to vent acid fumes all over the insides of the boat with bad results for anything metal. SLA or Gel cell battery.
I look at battery information sheets that sellers should show to get the dimensions and make card mock-ups of likely candidates to see what fits, then I can do try-out ballasting with that weight where the battery will go to see if its going to float properly.
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Old Apr 16, 2013, 06:31 AM
Vita ex Machinis
patmat2350's Avatar
Motor City
Joined Dec 2004
12,962 Posts
Get one with a strap! Or, I made a tray with handles for this one:
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Old Apr 16, 2013, 06:58 AM
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Jerome Morris's Avatar
Union, Maine
Joined Jul 2006
4,486 Posts
Great idea Pat!
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Old Apr 16, 2013, 07:03 AM
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Robert Pulse's Avatar
Davenport, Iowa
Joined Apr 2007
1,493 Posts

The motors have tags on them stating the voltage they are designed to run on. check the type of speed control and google it-them to get their operating info.
Nice boat.
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Old Apr 16, 2013, 08:14 AM
Cheif Bottlewasher
more coffee's Avatar
Canada, NS, Sydney Mines
Joined Sep 2005
3,195 Posts
I just use thebattery out of my lawn tractor, pulls like a champ.
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