Battery Voltage went from 11.8 to 8.4 after charge By pixologist (Read 446 times)

[pixologist]

The first thing to go were my high-beams and then shortly after my regular headlights stopped working. Last week, I went for an hour long ride (I usually only ride for 15 minutes max, but I had a meeting to get to), and about 45 minutes into the drive, the bike was having trouble revving after idling at stop lights. I usually had to feather the throttle until it'd go again. At some point, it didn't want to rev up at all and turned off instantly and wouldn't turn on after that. Luckily, I only had a mile walk left to my meeting (albeit in the hot sun and a suit) and I towed it back home after that.

After that, it didn't as much as make a noise when I pressed the electric start or even the kick-start. I checked the voltage on the battery and it showed at 11.8v, so I charged it and it went down to 8.4v (though, I now know I should've charged it for 5-10 hours and not 2). The battery is now charging, but I have the feeling that it's more than just the battery. Any suggestions?

Regards,

Pixologist




Model is TaoTao atm-50a1

[ctpgs]

may be your regulator stopped working just had to replace mine recently had all kinds of weird problems headlights blew replaced them and they would flicker constantly then my battery died and instrument cluster went crazy would not idle right at start up, would stall if i dd not give it gas, replaced regulator and battery and all is good now, easiest way to check is to put the battery in and check voltage with a voltmeter should be 13 volts at idle mine according to manual 13-14 volts when the regulator was bad it was 10 to 17 volts 17 when i revved the engine

[pixologist]

Thanks ctpgs,

I just took apart the front and took a look at the voltage regulator and it looks to be burnt. I'm hesitant to try and turning the bike on for fear that it'll short circuit or drain the battery again. Also, did you replace the entire regulator system and the battery? Was the battery damaged because of the regulator?

Thanks.

[pixologist]

I just tested the voltage on the regulator and the hot red wire that connects directly to the battery is only getting 1.4~ volts, as opposed to, if I'm not mistaken 12 volts. Does that call for a replacement?

[ctpgs]

i replaced the regulator and the battery, the regulator had overcharged the battery and killed it, it was so bad it started leaking acid, the voltage with the scooter running should be around 13 volts or a little more at idle mine goes up to about 14.5 with the engine revving, when testing it with voltmeter you should have one lead the positive side of the battery and one on the negative. if the regulator looks burnt i would replace it