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Planning to whip the battery off my '09 for a couple of days. Does anyone know how long the instruments hold their data (odometer) for after removal of the battery?......And will it affect the alarm? (Triumph Datatool).
 

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Pretty sure as soon as that bad boy is disconnected all data other than your ODO will be lost. I have had my battery out for as little as 1 min on my 07 and all data was lost.
 

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Does anyone know how long the instruments hold their data (odometer) for after removal of the battery?......And will it affect the alarm? (Triumph Datatool).
It will hold the odometer forever; the trip however will reset to zero immediately.
If alarm is disarmed, it will have no affect - if armed, it will trigger.
 

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This is somewhat tangential but if your battery will be out for a few days, it helps to hook it to a battery tender. Whatever arcing and sparking and initial current draw the bike does when first reconnected seems to draw enough out of the battery to make that first start a little sluggish.
 

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I regularly disconnect my SIII battery, preferring to hook it up to my bench charging platform when the bike is not in use. I can honestly say I have never experienced any "arching and sparking" when reconnecting it! If the battery is correctly connected carefully -- ground line last -- and there are no lurking electrical/wiring problems with the bike, the initial current draw should be minimal, if anything.

 

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... Whatever arcing and sparking and initial current draw the bike does when first reconnected seems to draw enough out of the battery to make that first start a little sluggish.
Certainly should be no arcing/sparking when reconnecting - as Deaono suggests the current will be a few mA at most (to the clock);
and if battery is in good order and is at decent charge level when removed, should easily hold its charge for couple of weeks without having to be on a tender.
If it discharges just from sitting over that time, battery probably past its best
 

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"Arcing and sparking" is a gross exaggeration, sorry. Mine always seems a little weak cranking if I've been repeatedly connecting / disconnecting it but it could be my imagination.
 
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