<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div id="yui_3_16_0_ym19_1_1459904755026_2994">Alan,</div><div id="yui_3_16_0_ym19_1_1459904755026_2994" dir="ltr">That is great and clearly the battery has stood the test of time. Thanks'</div><div id="yui_3_16_0_ym19_1_1459904755026_2994">Hank</div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Tuesday, April 5, 2016 7:00 PM, Alan James via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv3895596807"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2515"><span>Hank,</span></div><div id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2508"><span id="yiv3895596807yui_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="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2506"><span id="yiv3895596807yui_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 dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2527"><span id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2586"><a rel="nofollow" shape="rect" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2585" target="_blank" href="http://www.psubs.org/projects/1235435392/ambientsub/">http://www.psubs.org/projects/1235435392/ambientsub/</a></span></div><div dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2580"><span id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2579">I added 2 one way 3psi cracking pressure valves; one operating one way & the </span></div><div dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2582"><span id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2581">other the opposite way. The internals of the battery are supposed to be pressurized</span></div><div dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2584"><span id="yiv3895596807yui_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 dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2686"><span id="yiv3895596807yui_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 dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2705"><span>ascending. </span></div><div dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2601"><span id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2626">I filled it with mineral oil, exposure to oxygen will degrade the battery.</span></div><div dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2665"><span id="yiv3895596807yui_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 dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2688"><span id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2687">type of AGM battery.</span></div><div dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2704"><span id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2703">Deep Sea Power & light have an AGM total ocean depth sea battery.</span></div><div dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2740"><span id="yiv3895596807yui_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 dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2742"><span id="yiv3895596807yui_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="yiv3895596807yui_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 dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2806"><span id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2805">charging. If you go on their site you will get an idea.</span></div><div dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2808"><span id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2815"> <a rel="nofollow" shape="rect" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2814" target="_blank" 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 dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2838"><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 dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2866"><span>Just make sure it's pure mineral oil.</span></div><div dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2867"><span>Cheers Alan</span></div><div class="yiv3895596807qtdSeparateBR" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2514"><br clear="none"><br clear="none"></div><div class="yiv3895596807yahoo_quoted" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2521" style="display:block;"> <div id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2520" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2519" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv3895596807yqt3342080741" id="yiv3895596807yqt41519"><div dir="ltr" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2518"> <font id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2517" face="Arial" size="2"> </font><hr id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2516" size="1"> <b><span style="font-weight:bold;">From:</span></b> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Wednesday, April 6, 2016 10:42 AM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> [PSUBS-MAILIST] agm battery<br clear="none"> </div> <div class="yiv3895596807y_msg_container" id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2871"><br clear="none"><div id="yiv3895596807"><div id="yiv3895596807yui_3_16_0_ym19_1_1459902783395_2870"><div id="yiv3895596807yui_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="yiv3895596807yui_3_16_0_ym19_1_1459895864470_3648">Alan,</div><div id="yiv3895596807yui_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="yiv3895596807yui_3_16_0_ym19_1_1459895864470_3648">Hank</div></div></div></div><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"><br clear="none"><br clear="none"></div></div> </div> </div> </div></div></div></div><br><div class="yqt3342080741" id="yqt50243">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br><br></div> </div> </div> </div></div></body></html>