Recharging Battery and LEJOS...

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Recharging Battery and LEJOS...

Postby CrazyJo » Mon Aug 17, 2009 9:28 am

Hi.

I bought a recharging battery 9-12V LEGO for the NXT Robot.

LEJOS never indicate (icon battery) that the battery is completely full even after I let recharged the battery all the night...

Is it a bug with LEJOS or my recharging battery have a problem ?

Is there a setting to do in LEJOS (to set 9 or 12V ?! )

Thanks !
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Postby gloomyandy » Mon Aug 17, 2009 9:45 am

Hi,
There is no problem with your battery. leJOS 0.8 (and earlier), simply displays the current voltage of the battery based on a full scale reading of 9V. The system menu will tell you the actual voltage. In the next release of leJOS we will detect if a Lego rechargeable battery is in use and if so adjust the full scale reading to be 8.2V so you will get a "full battery" display.

Andy
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Postby CrazyJo » Mon Aug 17, 2009 10:52 am

Ok thanks for this explications ! :)

A last question : How many hours lasts a full battery?
And how many times it takes to recharge ?

The red light never turns off even after all a night of recharging ! ...
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Postby gloomyandy » Mon Aug 17, 2009 11:29 am

Hi,
How long they last is very hard to say (it depends on what you are using them for) - for instance if you just turn on the nxt then it will last for a day or so, but if you are running all three motors then it will last much less!

Not sure how long it takes to fully charge (I often just leave mine connected). One of the lights on my batteries certainly does go off from time to time (not sure which one). Maybe you just need to leave it longer...

Some interesting information here...
http://forums.nxtasy.org/index.php?showtopic=4006&hl=battery

Andy
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Postby Atr » Mon Aug 17, 2009 10:02 pm

Hi there

In the next release of leJOS we will detect if a Lego rechargeable battery is in


I think that even better than detection would be if there was an option to choose if your max voltage is zirka 8.2V (lego battery or 6 rechargeable 1.2V batteries) or 9V (6 1.5 batteries)

For example I,m using 6*1.2V and have similar situation as described above
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