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FJR Motorcycle Forums
Technical & Mechanical Problems
Do Battery Tenders fail?
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<blockquote data-quote="charismaticmegafauna" data-source="post: 684179" data-attributes="member: 665"><p>What he ^^^^ said.</p><p></p><p>I recently got a M.F. (factory fill) AGM battery (not for FJR, tho) and the paperwork with it stated: "Check voltage every 3 months." I find that works for me -- when my bikes sit for any length of time I just check the voltage; if it's OK, it's OK -- if not, they get charged 'till it is.</p><p></p><p>100% = 12.8V ~ 13.0V.</p><p></p><p>BTW, the FSM gives a rather elaborate explanation for battery charging -- using both a variable voltage charger and a constant voltage charger (it fails to mention the use of a maintainer...). The FSM often encourages the tech to 'check the voltage'.</p><p></p><p>It also warns: "The MF battery should be charged as explained..." And, "If the battery is overcharged, the electrolyte level will drop considerably. (thereby shortening battery life and performance) Therefore, take special care when charging the battery."</p><p></p><p>I'm not so sure hooking-up a small charger and leaving it on is such a good thing...? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite24" alt=":unsure:" title="Unsure :unsure:" loading="lazy" data-shortname=":unsure:" /></p></blockquote><p></p>
[QUOTE="charismaticmegafauna, post: 684179, member: 665"] What he ^^^^ said. I recently got a M.F. (factory fill) AGM battery (not for FJR, tho) and the paperwork with it stated: "Check voltage every 3 months." I find that works for me -- when my bikes sit for any length of time I just check the voltage; if it's OK, it's OK -- if not, they get charged 'till it is. 100% = 12.8V ~ 13.0V. BTW, the FSM gives a rather elaborate explanation for battery charging -- using both a variable voltage charger and a constant voltage charger (it fails to mention the use of a maintainer...). The FSM often encourages the tech to 'check the voltage'. It also warns: "The MF battery should be charged as explained..." And, "If the battery is overcharged, the electrolyte level will drop considerably. (thereby shortening battery life and performance) Therefore, take special care when charging the battery." I'm not so sure hooking-up a small charger and leaving it on is such a good thing...? :unsure: [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Do Battery Tenders fail?
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