Types of batteries Lead-Acid, Flooded(wet), Gelled & AGM's - Luxury Coach Lifestyles
Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
Thread Tools Display Modes
Old 03-18-2013, 04:39 PM   #1
Senior Member
NewellCrazy's Avatar
Join Date: Sep 2006
Location: Sugarland, TX or Salida,CO
Posts: 1,867
Default Types of batteries Lead-Acid, Flooded(wet), Gelled & AGM's

I am sharing a very well written article that explains different battery types.

Practically all batteries used in alternative energy solar power backup systems are Lead-Acid type batteries. Even after over a century of use, they still offer the best price to power ratio. ALL of the batteries commonly used in deep cycle applications are Lead-Acid. This includes the standard flooded (wet) batteries, gelled, and AGM (Absorbed Glass Mat). They all use the same chemistry, although the actual construction of the plates etc varies.
The lifespan of a deep cycle battery will vary considerably with how it is used, how it is maintained and charged, temperature, and other factors.
These are some typical expectations for batteries if used in deep cycle service.

Type of battery: Expected battery life in "deep-cycle" mode

3-12 months

1-6 years

Golf cart:
2-7 years

Gelled deep cycle:
2-5 years

AGM deep cycle:
4-7 years

Starting batteries are commonly used to start and run engines. Engine starters need a very large starting current for a very short time. Starting batteries have a large number of thinplates for maximum surface area. The plates are composed of Lead Sponge, similar in appearance to a very find foam sponge. This gives a very large surface area, but if deep cycled, this sponge will quickly be consumed and fall to the bottom of the cells. Automotive batteries will generally fail after 30 - 150 deep cycles if deep cycled, while they may last for thousands of cycles in normal starting used (2-5% discharge).

Deep cycle
batteries are designed to be discharged down as much as 80% time after time, and have much thicker plates. The major difference between a true deep cycle battery and others is that the plates are SOLID Lead plates not sponge. This gives less surface area, thus less instant power like starting batteries need. Although these an be cycled down to 20% charge, the best lifespan vs cost method is to keep the average cycle at about 50% discharge.

Golf cart
batteries are quite popular for small systems and RV's. The problem is that golf cart¯ refers to a size of battery (commonly called GC-2, or T-105), not the type or construction so the quality and construction of a golf car battery can vary considerably - ranging from the cheap off brand with thin plates up the true deep cycle brands, such as Crown, Deka, Trojan, etc. In general, you get what you pay for.

Marine batteries are usually a "hybrid"¯, and fall between the starting and deep-cycle batteries. In the hybrid, the plates may be composed of Lead sponge, but it is coarser and heavier than that used in starting batteries. It is often hard to tell what you are getting in a "marine" battery, but most are a hybrid.

Gelled deep cycle batteries, or "Gel Cell"¯ contain acid that has been "gelled"¯ by the addition of Silica Gel, turning the acid into a solid mass that looks like gooey Jell-O. The advantage of these batteries is that it is impossible to spill acid even if they are broken. However, there are several disadvantages (must be charged at a slower rate and lower voltage to prevent permanent damage, In hot climates, water loss can be enough over 2-4 years to cause premature battery failure).

AGM,or Absorbed Glass Mat deep cycle batteries have all the advantages (and then some) of gelled, with none of the disadvantages, and they can take much more abuse. Since all the acid is contained in the glass mats, they cannot spill, even if broken. This also means that since they are non-hazardous, the shipping costs are lower. In addition, since there is no liquid to freeze and expand, they are practically immune from freezing damage. Nearly all AGM batteries are combinant what that means is that the Oxygen and Hydrogen recombine INSIDE the battery. AGM's will cost 2 to 3 times as much as flooded batteries of the same capacity. In many installations, where the batteries are set in an area where you don't have to worry about fumes or leakage, a standard or industrial deep cycle is a better economic choice.

Deep Cycle Batteries - Battery Science - associationofcleanenergyprofessionals.com


If Ain't a Newell, It Ain't Wurt Oonin!
NewellCrazy is offline   Reply With Quote
Old 03-18-2013, 05:12 PM   #2
Senior Member
cdat's Avatar
Join Date: Dec 2012
Location: Idaho
Posts: 236

Sean, appreciate you taking the time to post this, always enjoy tech articles that teach me more.


John and Patti
Julie and Gracie (Our papillons)
91 Newell
cdat is offline   Reply With Quote
Old 03-18-2013, 05:29 PM   #3
Senior Member
NewellCrazy's Avatar
Join Date: Sep 2006
Location: Sugarland, TX or Salida,CO
Posts: 1,867

Your welcome John, It's good to hear others actually read what I post.


If Ain't a Newell, It Ain't Wurt Oonin!
NewellCrazy is offline   Reply With Quote
Old 03-18-2013, 07:03 PM   #4
Senior Member
GringoPhil's Avatar
Join Date: Dec 2007
Location: Armenia, Wisconsin
Posts: 278

Many consider 8D's to be a combination of deep and starting. Course-there are dedicated starting batteries (with many thin plates for concentrated jolt for starting) and there are deep cycle batteries (fewer thicker plates that retain amps but are slower to release). You can use the 8D for deep cycle-but if it is a designed starting battery, will just have a shorter life. Which ever battery you use, should not allow the battery to go below 12v without a load on it.
1983 Newell Coach
GringoPhil is offline   Reply With Quote

Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
77 Newell Repower? rellick Major Mechanicals 72 04-20-2014 06:07 PM
good air brakes tutorials? MarkSparks Life on the Road | Livin' in Luxury 7 03-30-2013 11:02 PM
What's your story what it is we can learn from you? Will Procter Off-Topic Discussions & Humor 5 03-26-2013 09:26 PM
Keeping Shower Glass Door Clean With No Water Spots PIExpress Interior Works 8 03-21-2013 02:30 AM
Fuel express1 General Technical Discussion 40 05-06-2011 01:08 AM

» Recent Threads
» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

This website is not affiliated with or endorsed by Newell Coach Corporation or any of its affiliates. This is an independent, unofficial site.

All times are GMT. The time now is 10:09 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.