<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1459902783395_2515"><span>Hank,</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2508"><span id="yui_3_16_0_ym19_1_1459902783395_2507">yes it worked well, but it was for inside an ambient sub, so it didn't see water.</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2506"><span id="yui_3_16_0_ym19_1_1459902783395_2505">I took the top off the battery & replaced it with acrylic & took the cell valves off.</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2527" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2586"><a id="yui_3_16_0_ym19_1_1459902783395_2585" href="http://www.psubs.org/projects/1235435392/ambientsub/">http://www.psubs.org/projects/1235435392/ambientsub/</a></span></div><div id="yui_3_16_0_ym19_1_1459902783395_2580" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2579">I added 2 one way 3psi cracking pressure valves; one operating one way & the </span></div><div id="yui_3_16_0_ym19_1_1459902783395_2582" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2581">other the opposite way. The internals of the battery are supposed to be pressurized</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2584" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2583">at between 1 & 6psi to reabsorb gasses, so the 2 valves maintain that internal pressure.</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2686" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2685">One valve lets air in at over 3psi when descending & the other lets the pressure out while</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2705" dir="ltr"><span>ascending. </span></div><div id="yui_3_16_0_ym19_1_1459902783395_2601" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2626">I filled it with mineral oil, exposure to oxygen will degrade the battery.</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2665" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2664">I did think of a better way that avoided the acrylic plate, but it would depend on the</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2688" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2687">type of AGM battery.</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2704" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2703">Deep Sea Power & light have an AGM total ocean depth sea battery.</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2740" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2739">I believe they take the valves off the battery cells & fill with mineral oil & place in a battery</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2742" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2741">box also filled with mineral oil. Over the top is clamped a clear flexible diaphragm that has a </span><span id="yui_3_16_0_ym19_1_1459902783395_2772">fill / drain valve in it. You need to release any gasses that may build up, mainly while</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2806" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2805">charging. If you go on their site you will get an idea.</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2808" dir="ltr"><span id="yui_3_16_0_ym19_1_1459902783395_2815"> <a id="yui_3_16_0_ym19_1_1459902783395_2814" href="http://www.deepsea.com/wp-content/uploads/SeaBattery_Specifications.pdf">http://www.deepsea.com/wp-content/uploads/SeaBattery_Specifications.pdf</a></span></div><div id="yui_3_16_0_ym19_1_1459902783395_2838" dir="ltr"><span>There are specs & manuals.</span></div><div dir="ltr"><span>My battery is still holding a charge years later, so doesn't mind the mineral oil.</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2866" dir="ltr"><span>Just make sure it's pure mineral oil.</span></div><div id="yui_3_16_0_ym19_1_1459902783395_2867" dir="ltr"><span>Cheers Alan</span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1459902783395_2514"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1459902783395_2521" style="display: block;"> <div id="yui_3_16_0_ym19_1_1459902783395_2520" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1459902783395_2519" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1459902783395_2518" dir="ltr"> <font id="yui_3_16_0_ym19_1_1459902783395_2517" face="Arial" size="2"> <hr size="1" id="yui_3_16_0_ym19_1_1459902783395_2516"> <b><span style="font-weight: bold;">From:</span></b> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, April 6, 2016 10:42 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] agm battery<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1459902783395_2871"><br><div id="yiv7358334249"><div id="yui_3_16_0_ym19_1_1459902783395_2870"><div id="yui_3_16_0_ym19_1_1459902783395_2869" style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);"><div id="yiv7358334249yui_3_16_0_ym19_1_1459895864470_3648">Alan,</div><div id="yiv7358334249yui_3_16_0_ym19_1_1459895864470_3648">Did you successfully make a deep sea AGM battery? I realize they are pressurized but can I drill and fill with oil then put a spring loaded pressure compensator into the drilled hole to create the internal pressure. So the battery would have a constant pressure inside at the surface then it increases as the battery dives to match water pressure. Will that work? I would like to move my AGM's to the outside of Elementary 3000.</div><div id="yiv7358334249yui_3_16_0_ym19_1_1459895864470_3648">Hank</div></div></div></div><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></div></body></html>