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Message: <blockquote data-quote="astroboy" data-source="post: 722970" data-attributes="member: 4527">Do not forget to register the new battery in ECU to reset the charge cycle. There's a charge cycle program in our ECU to manage our battery charging. Charge load will reduce as the battery age to prevent over charging an aged battery to maximise battery life. So the date of installation and battery capacity is 2 critical parameter required by the ECU to regulate the charging efficiently.People asked me what if they disconnect battery for some electrical works to be carried out and reconnect the battery. I then ask them does that change the age and capacity of the battery. If answer is no, then no need to re-register.</blockquote>