Charger problems and advice please

LesleyA

Pedelecer
Jul 11, 2012
28
0
My hubby has a Thompson K2 Style electric bike, and after spell of not using, put on charge for a trip out last weekend. Charger showed red light when plugged in, so left to do its thing, came back a few hours later, light was out so thought all was good. When he fitted battery to bike, it initially showed full charge on meter, but power went down almost instantly until it was almost flat.

He then remembered that charger is actually supposed to show a green light when charging done, so the fact that light went out completely maybe means charger has blown, so didn't actually juice the battery at all. We plugged battery in to charge again, and now no lights on charger come on at all.

I have done a search online and cannot find anything like the charger we have. Its a Shenzen ABT Co Ltd, Model 3PX0-N7030, 24v 1.8A for NIMH batteries, so a direct replacement looks unlikely. Contacted Thompson, and even though they still sell a remarkably similar bike now, they advised the batteries are not compatible. Going to dig out voltmeter tomorrow to see if there is any life in the charger, but if there isn't, where do we go from here? Or if it isn't actually the charger, would a duff battery cause the charger lights not to work? Bike is in really good nick, so too good to scrap. Any advice much appreciated, thank you
 
D

Deleted member 4366

Guest
You've probably blown the fuse in the charger or the charge fuse in the battery. You should be able to find out what's wrong wiyh a normal digital multimeter.
 

Ajax

Esteemed Pedelecer
Feb 2, 2008
330
33
You've probably blown the fuse in the charger or the charge fuse in the battery. You should be able to find out what's wrong wiyh a normal digital multimeter.
Some batteries will have a fuse in them too, if that goes it will prevent the battery accepting a charge.
 

LesleyA

Pedelecer
Jul 11, 2012
28
0
Thanks for replies. Checked fuses in charger and battery and both seem OK. Re-soldered a connection that looked a bit weak in the battery box, but still nothing. Not sure where we go from here ... there is a local electric bike shop but they charge £15+VAT to run a battery/charger test ... any other suggestions much appreciated, thanks ;)
 
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Deleted member 4366

Guest
Get yourself a meter. "Seem OK" doesn't mean OK.
 

flecc

Member
Oct 25, 2006
53,478
30,789
Here's a link to plenty of cheap multimeters, down to one at only £2.98 at Argos.

They'll all do the job for you, and there's plenty of multimeter tutorials online.
.
 
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