Reply
 
Thread Tools Search this Thread
 
Old 28 January 2009, 09:01   #1
Member
 
Country: UK - England
Town: N. Devon
Boat name: Nutkin Too
Make: X-Pro Defender
Length: 5m +
Engine: Outboard, Suzuki 90
MMSI: 235095884
Join Date: Dec 2008
Posts: 1,367
RIBase
10.5v?

Hi all

A question to which I think I knowthe answer

When I brought the rib home the battery was dead flat. I charged it for 48 hrs and then put a voltage tester accross it. It only read 10.5v.

The charger was charging at 15v and if I put the tester accross then disconected the chager the volts just dropped away. It has been constant at 10.5v for about 5 hours.

Is it possible that the Mariner 40 only needs a 10.5v battery and that is what is fitted or is it, as I suspect, of no use and should be a 12v one. There is no voltage printed on it only an amperage.

Andy
__________________

__________________
treerat is offline   Reply With Quote
Old 28 January 2009, 09:16   #2
Member
 
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
I would politely suggest its screwed & you need a new battery . All the batteries ( of this type ) I've ever had have at least 12.5 v charged with no load irrespective of AH
__________________

__________________
PeterM is offline   Reply With Quote
Old 28 January 2009, 09:23   #3
Member
 
Country: UK - Wales
Town: Here
Boat name: doggypaddle
Make: Avon 5.4 Searider
Length: 5m +
Engine: yamaha 80
Join Date: Jul 2007
Posts: 1,107
Quote:
Originally Posted by Blackroady View Post
I would politely suggest its screwed & you need a new battery . All the batteries ( of this type ) I've ever had have at least 12.5 v charged with no load irrespective of AH
Inline.
Lead acid battery 6 cells nominally 2 volts each 2.2 fully charged.
10.5 volts = one dead cell
You need to spend some rubels on a new battery.
__________________
I am usually not as green as i am cabbage looking.
doggypaddle is offline   Reply With Quote
Old 28 January 2009, 15:00   #4
Member
 
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Definitely a toasted battery.

Should read over 12V at rest (even if somewhat discharged.) 12.2 to about 12.6 is normal.

BTW, 15V is a little heavy for a charging voltage; should be more in the 14.0 to 14.6 range. Perhaps a new charger should be on the shopping list as well.

jky
__________________
jyasaki is offline   Reply With Quote
Old 28 January 2009, 15:38   #5
Member
 
Country: UK - Wales
Town: Here
Boat name: doggypaddle
Make: Avon 5.4 Searider
Length: 5m +
Engine: yamaha 80
Join Date: Jul 2007
Posts: 1,107
Quote:
Originally Posted by jyasaki View Post
Definitely a toasted battery.

Should read over 12V at rest (even if somewhat discharged.) 12.2 to about 12.6 is normal.

BTW, 15V is a little heavy for a charging voltage; should be more in the 14.0 to 14.6 range. Perhaps a new charger should be on the shopping list as well.

jky
15 volts is fine for a charger, but as jky says it would be too high to leave on continuous charge, newer calcium batteries tend to need a bit more than 14.6 volts 14.8-15 is fine, bear in mind we dont know what current the battery was drawing at 15 volts, i would guess not much with a dead cell so the voltage would be a little high. chargers tend not to have smoothing capacitors or regulators so open circuit voltage readings with a DC meter are a bit inaccurate anyway.
__________________
I am usually not as green as i am cabbage looking.
doggypaddle is offline   Reply With Quote
Old 28 January 2009, 15:53   #6
Member
 
Country: Greece
Town: Athens
Boat name: IOS
Make: Nuova Jolly
Length: 7m +
Engine: Suzuki DF300
Join Date: Jan 2008
Posts: 3
this may help to understand the approximate charge.

Digital Voltmeter Open Circuit Voltage Approximate State-of-Charge
12.65 100%
12.45 75%
12.24 50%
12.06 25%
11.89 Discharged
__________________

__________________
Nektarios is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 14:29.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.