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This is a handheld vacuum cleaner with a simple circuit inside. I’ve charged it fully for a good while and also tried decharge-recharging it but no joy. All it can manage to do is ticking the engine which is not powerful enough to get it on full rounds and working. I have contacted the producer and they said they don’t have batteries available for this item. Is there a way I could find out if it’s the battery or something else? I find it a waste to put this in the bin and buy a new one. engine and batteries

P. S. I have a video but it doesn’t seem like I can upload videos here.

Update:

Here’s how I’m testing it with the 9V battery: testing with 9v battery

Update #2: I’m not sure if the contact is made but here’s how I’m testing and still no joy. I have a feeling that I’m making a mistake somewhere.

testing

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  • Probably batteries. You could build your own. I did this to a wine bottle opener that lost its umph.
    – Jeff Cates
    Commented Mar 17, 2019 at 19:51

1 Answer 1

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Easy fix if it's the batteries

The batteries are 18650s they are extremely common they are used in power tools, laptops, home devices and they are even the driving force behind the Tesla automobiles.

Test

Cut the red and black wires going to the batteries one at a time. Strip off a little bit of insulation and apply them to a 9 volt battery. Red+ black -

Leave the yellow wire for now. It senses the voltage for the charge indicator light. It's possibly connected to a chip wrapped in the battery casing.

This is what the individual batteries look likeenter image description here

CAUTION

These batteries have a lot of kick. They are potentially very dangerous if the contacts are shorted. They will melt wire and are very capable of starting a fire.

If the unit runs on a 9v then the batteries need replacing. If that's the case you will need to order some Amazon has lots of them. You'll want to find some with the same mAh rating. In your case you will need two 1300mAh batteries.

something like this, basically apply power directly to the motor.

enter image description here

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  • Do a bit of research on soldering leads to batteries -- it's not trivial. (Or, best case, buy batteries with tabs or leads already attached.) You want 'unprotected', as opposed to 'protected' batteries.
    – Aloysius Defenestrate
    Commented Mar 18, 2019 at 0:53
  • Would a 9V rectangular cube battery (whatever you call them!) work?
    – Neeku
    Commented Mar 18, 2019 at 12:57
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    Yes exactly, only for testing purposes. A 9v cube will not last long running that motor. It will only tell you if the motor is good.
    – Joe Fala
    Commented Mar 18, 2019 at 14:18
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    you can buy battery holder clips for 18650, just like those for AA, and you can even get them in different configs, like 2S, 2P, etc. A lot safer than wrongly soldering to batteries.
    – dandavis
    Commented Mar 18, 2019 at 18:56
  • So I’m testing this with the 9v, but switching it on or off does nothing whatsoever. Could you take a look at the picture above please? I cut the metal plates that were soldered and placed them on the + and - terminals of the battery.
    – Neeku
    Commented Mar 29, 2019 at 19:37

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