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--- electrical:12v:deep_cycle_battery [2022/10/04 19:26]
frater_secessus [Gel cell] betta teardown
+++ electrical:12v:deep_cycle_battery [2023/06/12 11:24]
frater_secessus [FLA - Flooded Lead Acid] added watering
@@ Line 155: / Line 155: @@
+=== watering FLA ===
+  - check to ensure plates are at least //covered// with liquid
+  - charge fully
+  - check water level again, adding to fill mark
+This order is important because the electrolyte expands a bit as it charges, so filling completely //then// charging could result in spillage and loss of acid.
 ==== VRLA - Valve Regulated Lead Acid ====
@@ Line 186: / Line 192: @@
     * no outgassing under normal conditions
   * CON
-    * generally **double the cost** of FLA for about 20% less capacity((http://www.trojanbattery.com/Tech-Support/FAQ/BatterySelection.aspx))
+    * generally **double the cost** of FLA for similar capacity((http://www.trojanbattery.com/Tech-Support/FAQ/BatterySelection.aspx))
     * Premium AGM need **much more charging current** than flooded, and it may be more than solar-only setups can provide.((http://www.cheaprvliving.com/forums/Thread-How-much-of-an-issue-is-battery-off-gassing?pid=144704#pid144704)) The charging rate given by Lifeline, a respected AGM manufacturer, is //at least// C/5((20A per 100Ah of battery capacity)) or battery life will be affected. They also say it is ok to charge up to 5C((500A per 100Ah of battery capacity!)) (!).((http://lifelinebatteries.com/wp-content/uploads/2015/12/manual.pdf))  Odyssey specifies C/2.5 charging rates for their batteries.((40A per 100Ah of battery capacity))((http://www.odysseybattery.com/documents/ODYSSEY_Battery_Reconditioning_Charge_Procedure.pdf))
     * even cheap AGM require more current than flooded:  minimum C/5, max C/3.(20A-33A per 100Ah of battery capacity).
@@ Line 214: / Line 220: @@
 These appear to be an AGM variant with some gel:
->> The plate group was taken apart, which showed that the separator is a standard AGM (absorbent glass
+>> The plate group was taken apart, which showed that the separator is a standard AGM (absorbent glass mat) with double layer. Additionally, a very small amount of gellified electrolyte was found on top of the plates. -- - [[https://www.dropbox.com/s/zz7vf6k8y36btfq/Memo%20%28internal%29%20Betta%20Lead%20Crystal%2026032013.pdf?dl=0|leaked pdf  describing a Betta battery teardown]]
-mat) with double layer. Additionally, a very small amount of gellified electrolyte was found on top of the
-plates. -- - [[https://www.dropbox.com/s/zz7vf6k8y36btfq/Memo%20%28internal%29%20Betta%20Lead%20Crystal%2026032013.pdf?dl=0|leaked pdf  describing a Betta battery teardown]]
 The "Lead crystal" name appears to refer to the gel component, since manufacturers typical claim the electrolyte is made of SiO2.((http://azimuthsolar.ca/getting-silicon-dioxide-sio2-batteries-charging-instructions/)),((https://www.solarpaneltalk.com/forum/solar/the-pros-and-cons-of-solar-energy/22713-why-are-there-no-lead-crystal-battery-distributors-in-the-usa-or-canada?p=272482#post272482))

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