Battery Questions - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems
 Not a Member? 
  #1  
Old 05-18-2009
Junior Member
 
Join Date: Aug 2007
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
sundog01 is on a distinguished road
Battery Questions

Went to the boat last weekend and my battery charger died, unknown to me. I thought that the batteries were full charged - however - the next morning both were dead with the charger on. Went and borrowed another battery charger and it took all day to charge 1 battery. Next day the same battery was down to 10 volts. I finally got the motor started and fully charged both batteries according to the volt meter. I realize the volt meter is no indicated of amperage. I then had to leave the boat.

My questions are - could the malfunctioning battery charger kill my batteries?
What would cause a fully charged (supposedly) battery to lose charge overnight, with nothing on and the battery switch off?

The charger is of unknown age and the batteries are 2 years old, deep cycle.

I plan on replacing both batteries and the charger.

Thanks for your help.
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 05-18-2009
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
If the batteries were left partially charged for a significant period of time, the battery plates may have sulfated and died. If the batteries were over charged by any significant amount, they may be dead too. If the batteries were down to 10 volts, they were far past the fully discharged point, where the batteries would have been at about 11.6 volts DC.

Have you checked the water levels in the battery if it is a wet cell battery?
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Installing a Automatic Battery Selector Switch artbyjody Gear & Maintenance 24 07-08-2008 08:07 PM
Battery Bank Design Kevin Jeffrey Gear and Maintenance Articles 0 05-12-2003 09:00 PM
Battery Bank Design Kevin Jeffrey Cruising Articles 0 05-12-2003 09:00 PM
Installing a New Battery Bank Sue & Larry Gear and Maintenance Articles 0 09-26-2002 09:00 PM
Boat Battery Power East Penn Manufr. Gear and Maintenance Articles 0 01-18-1999 08:00 PM


All times are GMT -4. The time now is 02:25 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.