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 Catalina/Capri 25/250 Sailor's Forums
 General Sailing Forum
 Batteries and charging
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AADIVER
Admiral

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USA
966 Posts

Initially Posted - 08/21/2006 :  21:10:00  Show Profile  Visit AADIVER's Homepage
I want to replace my wet cell Group 24 12 volt battery for a Group 8G24 maintenence free gel battery. Will my Guest Battery Pal MAGNUM 3 amp, 12 volt charger work with a gel? Thanks.

Frank Farmer
Long Beach, CA
aa.diver@verizon.net
http://mysite.verizon.net/aa.diver

PRETTY PENNY
'01 C-250 WK, Hull #558

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AADIVER
Admiral

Members Avatar

USA
966 Posts

Response Posted - 08/21/2006 :  22:50:33  Show Profile  Visit AADIVER's Homepage
Answer to my question:

3 Amp Portable Charger
Part No. 2603
Description
Total Amps: 3 Amps

Number of Outputs: 1

Batttery System: 1-12V

Output Voltage: 12VDC

DC Output: 4' Output wires w/alligator clips

Input Voltage: 100-130VAC /50-60Hz

Input Connection: 6'AC cord w/standard plug

Dimensions: 3.1" x 3.5" x 2.34"

Weight: 1 Lb.

Product Features
Reverse Polarity Protected
Short Circuit Protected
3-Stage Switching Electronic Circuit
Maintenance Mode protects batteries during storage
Fully Potted to Waterproof Electronics
Vibration and Shock Protected
Self-Protecting under extreme ambient conditions
For Flooded, Gel and AGM batteries
2 - Year Limited Warranty
Meets all Guest Harsh Environment Guidelines

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JimB517
Past Commodore

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USA
3285 Posts

Response Posted - 08/22/2006 :  13:44:16  Show Profile  Visit JimB517's Homepage
Gel batteries are good because they can't spill acid when the boat is heeled over. Gel batteries have slightly less amp hours. Gel batteries are very sensitive to overcharging. I have gels. I turn on up my battery charger once ever few weeks. Even though it has a float charging stage, I don't leave it charging for long periods of time. Works fine. Don't cook your batteries.

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 08/22/2006 :  13:54:11  Show Profile  Visit Frank Hopper's Homepage
At three amps he may need to cook'm for a while!

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AADIVER
Admiral

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USA
966 Posts

Response Posted - 08/22/2006 :  20:19:19  Show Profile  Visit AADIVER's Homepage
Installed the new gel cell this morning. The charger LED was steady red. This afternoon it was steady green. With my wet cell it pulsed green, indicating fully charged and standing by. May I assume this will also pulse eventually?

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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts

Response Posted - 08/23/2006 :  11:00:23  Show Profile
Frank,
Are you sure the blinking is not indicating charging and the steady green incicating fully charged? You may have missed the blinking?

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AADIVER
Admiral

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USA
966 Posts

Response Posted - 08/24/2006 :  11:08:41  Show Profile  Visit AADIVER's Homepage
Per the Guest manual:
"When the green LED turns on, your battery is already at or near full charge, and the charger is now maintaining the battery. <u>If the green LED gradually fades on and off, this is an indication of an unusually efficient battery".</u>
So I guess my 50 buck wet cell was more efficient than my 180 gel cell

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