Connection between batteries

LED Flashlights – General Info 18650 Flashlights
1

Hi,

I know it is a stupid question but I can't find any answer in the forum.

I bought 18650 Sanyo batteries. On these batteries the plastic is bigger then the plus pole so there is no connection between the batteries when I put them in the torch . I own the trustfire 3xt6 3 cells.

I have put now normal steel washers between the batteries and it works, but there must be a better solution.

Thanks for the help

Jorg

2

I use a small neo magnet for flat tops, if you have a good hot iron you can just put a small blob on the postive end of the cells. On the left i used a small washer and the one on the right is using a magnet, i only recommend doing this if your soldering iron temp is at least 40 watts, dont want the cell to go thermal on you.

3

Hi,

Thanks I learned something new, these batteries are called flat tops . I think the idea with the small magnets is very good. Does my method do any harm or is it just not professional ?

Thanks

Jorg

4

If you must i would either put a solder blob or sauder the washer on there....but please be safe and make sure not to leave the tip on the cell for too long.

5

That's another option for flat tops, but probably not in Sanyo's case.

6

I don't see why you couldn't do it to Sanyo's. All you need is to lift the vent's 0.5-1mm and that will be enough. No damage to the vent's intended purpose. If anything, you gave it more relief.

7

Puh, looks pretty rough the method with the screwdriver. I just put one loose 6mm washer between the batteries and it works up to now. I am not sure if this is good idea, better I buy the magnets from DX but at the moment we are in a dispute over a lost parcel. any suggestions were I can buy these ones .

8

lol. The cells in the pic are salvaged laptop batteries. The blue ones are LG's that I dremeled off the spot welds. The green ones I decided not to grind down the welds. Works just the same.

Really, it's not hard to do.

The whole magnet/washer method scares me. If they just happen to shift....

9

Yeap! They better not shift.

10

Hi "fishmaniac"

I lifted the top with a very little screwdriver and they all work fine. My batteries were new Sanyo 2600 mAh.

Thank you for the tip.