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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
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  #1  
Old 12 Apr 2009
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How much juice?
Hi

I'm going to be charging AA batteries off the XT600 , but my question is this if I use say a 2hour charger on 4 AA 2500mah batteries on the XT how may watts or Amps will this take up? ,

I am pretty certain that charging AA batteries will not use as many amps or watts as heated grips, but it would be nice to know so I can consider just how much I can charge off the bike (I'm actually thinking of x2 AA chargers with 4 batteries in them each as the camera sucks those batteries dry , and we are probably going to use LED camp lights which are not as attractive to mozzies as fuel burning lights all which need AA batteries).

Any thoughts?

Thanks.
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Old 12 Apr 2009
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You realise that putting a 1.5V AA onto a 12V supply won't do it much good.

I hope you have a voltage regulator of some sort. If not they could explode
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Old 12 Apr 2009
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I have a car/wall combi charger that plugs into a cigarette socket and thus this normally being 12volts in a car should step down the voltage appropriately to 6volts , if it comes to it I can wire them all up in series so that I have 1.5volts x 8 and thus it will suck the 12volts ok probably maybe...


Though I am bringing one of those £10 solar panel things from maplins as last night a few XT riders I met did have them on and said they are useful as a backup if you kill the main battery.
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Old 12 Apr 2009
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Just plug in your charger whilst your riding and it'll be fine. I've been doing this for years on a variety of bikes without any problems.
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Old 12 Apr 2009
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Not that much ...
That is 8 batteries each 2500 mAh charged in 2 hours ...

So you will be needing nett 8 x 2500 / 2 = 10 000 mA = 10 A. But assuming an efficiency of 50 % of the battery chargers, that would be 20 A.

Guessing that your alternator produces max 300 watt, you will have 300 /12 (volt) = 25 A available, so there is only another 5 A available for ignition, lights etc.

I would use one charger at the time - that reduces the drain to an acceptable 10 A, leaving 15 A for your household.

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Old 13 Apr 2009
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I ran a pair of 2000 mA/h AA rechargeables off a Maplin-bought charger on my xt6e with no probs, but i wasn't riding at night and not using my day-running light during the charging. A, say, 4/5hr charge seems to power the batts for my camera just fine. Works for me
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