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FJR Motorcycle Forums
Technical & Mechanical Problems
Battery Stress Test
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<blockquote data-quote="RossKean" data-source="post: 1440176" data-attributes="member: 19880"><p>As SkooterG said, a voltmeter MAY give you some warning of imminent failure of a charging system. Useful for monitoring the inevitable decline of any battery and the health of the charging system. Good to have if you are running a bunch of extra stuff like heated gear and aux lighting to make sure the charging system is keeping up. Unfortunately, not all batteries die gradually and can go from OK one day to dead overnight due to a shorted or "open" cell. Voltmeter may not give you any warning. (Push start with a totally dead battery probably won't work since there is insufficient voltage to run the ECU or injectors.)</p><p></p><p>Note: Watch the voltage on starting - if it drops a lot, it could mean that the battery's cranking amp capacity is down OR it could mean that the starter is drawing too much current and is on the way out. In either case, it needs to be checked.</p><p></p><p>I also like the security of having a Lithium jump starter on trips (haven't needed it yet).</p></blockquote><p></p>
[QUOTE="RossKean, post: 1440176, member: 19880"] As SkooterG said, a voltmeter MAY give you some warning of imminent failure of a charging system. Useful for monitoring the inevitable decline of any battery and the health of the charging system. Good to have if you are running a bunch of extra stuff like heated gear and aux lighting to make sure the charging system is keeping up. Unfortunately, not all batteries die gradually and can go from OK one day to dead overnight due to a shorted or "open" cell. Voltmeter may not give you any warning. (Push start with a totally dead battery probably won't work since there is insufficient voltage to run the ECU or injectors.) Note: Watch the voltage on starting - if it drops a lot, it could mean that the battery's cranking amp capacity is down OR it could mean that the starter is drawing too much current and is on the way out. In either case, it needs to be checked. I also like the security of having a Lithium jump starter on trips (haven't needed it yet). [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Battery Stress Test
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