Need new battery - currently inside - Page 3 - Fiberglass RV

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Old 03-07-2016, 04:08 AM   #29
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Name: Raz
Trailer: Trillium 2010
Posts: 3,555
I received this PM from Brian BP.

Originally Posted by Raz
Since the electrolyte in an AGM is a gel, equilizing is not necessary

While an AGM battery may not need (or should not have) an equalizing cycle applied (check with the manufacturer), it does not have gelled electrolyte. While both gel and AGM batteries are sealed lead-acid designs, the electrolyte is handled very differently. The electrolyte in an AGM battery is liquid, absorbed into a mat of glass fibres.


My quote was lifted from a comment I made about an AGM failure on an early Parkliner. While AGM batteries and Gel batteries are different I'm not sure the difference in construction is important. What is important is the risk of thermal runaway due to improper ventilation and charging.

Here is the Parkliner battery thread for those that are interested. Note, while it has been edited by the powers that be, the pictures tell the story.

Smoking Batteries (was: Battery problem in our Parkliner)

Thermal Runaway is a positive feedback scenario where an increase in current causes an increase in temperature which causes an increase in current which causes an increase in temperature..... While I'm sure there are some who could explain it in more detail, what's important is the conclusion. All lead acid batteries are potentially dangerous and should be treated as such. Raz

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Old 03-31-2016, 12:41 AM   #30
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Name: Marina
Trailer: 1978 Biggar / 2007 Toyota Tundra V8 2wd
British Columbia
Posts: 286
When I had my Surfside, I took it to Reece at Escape Trailers and he put 2 deep cycle 6 volt batteries
inside under the front bunk in a double battery box. He then vented it to the outside but on the side of
the trailer, not the front so water would not come in the vent. Worked great and left me with room on the
hitch for two propane bottles and my bike rack.

Sent from my iPad using Fiberglass RV

Life would be a million times better if there were Pinatas strategically placed throughout the day.
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