Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: Stephanie on August 18, 2009, 09:32:47 PM

Title: Strange behavior - GWS charger
Post by: Stephanie on August 18, 2009, 09:32:47 PM

I bought a GWS MC-2002 charger and connected it to a lynxmotion NiMH 12v 1600mAh battery. Then I connected it to my car's battery (through the crocodile plugs) and started charging with 2A.

The battery had very little charge but, surprisingly, it started trickle mode after 1 or 2 mins.

I tested it with another battery (a 7.2v 2800mAh one) at 4A and the same thing happened.

If I try it more times the same thing happens (charges for a couple of mins, then it reports the battery is full).

It charged them enough to use the Axon bootloader (I couldn't do it before the charging attempts), but the Sabertooth still says the batteries are too depleted to drive motors.

(yes, I've used the Sabertooth before and it worked)

Does anybody know what happened? Why can't I charge my batteries?

Thanks in advance.

Title: Re: Strange behavior - GWS charger
Post by: Soeren on August 19, 2009, 01:15:05 AM

Hi,

Deliver the charger back for a refund or repair - it sounds like the end-of-charge detector is failing (or maybe "just" set incorrectly).