I was trying to see if I could charge the Ryobi P102 Lithium battery without the original charger (a working battery). According to some videos I have viewed, all one needs to do is attach charging current, 20 or so Volt to the + and - terminals of the battery. I let the battery drain to 18V. Then I connected 19.2V from a laptop power supply, positive to battery marked + and negative to battery marked -. But it did not work. So, I searched a little further. The battery post has 3 terminals. 1 on the side marked with + , one on the other side marked -. The third one in front (or you can call it behind) is not marked. Commonsense would say that the charger should have current between the corresponding +/- terminals. NOT SO. In the charger, I connect the probes of the meter to the two side terminals. It shows no current. But if I touch the one in the front to one of the two on the side, I get 3 volt, the front one being positive. So front-left is 3V and front-right is 3V. And this thing charges an 18V battery.
Can any one please explain the above. And how would 3V charge a battery to 20V or so?
Any one knows a way of charging this battery without owning the charger and without having to open the battery to charge it. Thanks.
Can any one please explain the above. And how would 3V charge a battery to 20V or so?
Any one knows a way of charging this battery without owning the charger and without having to open the battery to charge it. Thanks.