How to Rebuild old and non working Dewalt 20V battery with new cells. Easy!

In this video, I will show you how I rebuild the Dewalt 20V battery. I put new cells on it and I use a Portable Spot Welder to install the 18650 cells.

[@adriang7035]

Great video. I like the close ups and pace of your repair process. One could follow along. However, you also convinced me to just buy new one. thanks.

[@JosephofMN]

I laughed out loud when I saw the dremel tool come into frame. Nice work.

[@Redskool1]

Great video love the voice over lol.

[@user-bf7ig7js8z]

It is easier to just use flat top 18650 cells.

[@angelicaschlitz9933]

nice video! straight to the point, no BS!! keep up the good work

[@CarbonGlassMan]

I'm going to rebuild a couple Dewalt 20v packs. I'd get some good cells though. The cells that came out of that Dewalt pack were good Samsung 22a discharge rated 2000mah 18650 cells. I've got some Molicel P28A 18650 2800mAh 35A 18650 cells to try out. These cells are great in my long range drone.

[@waeiltobgy5301]

Nice welder tool

[@bugsbunny4157]

It was great without sound or mindless music

[@JT_70]

I used a 4ah DeWalt battery in my new blower. It ran down in 10 minutes (normal) but will not recharge. The charge light is solid red, indicating a full charge. I’m guessing that at least one 18650 died. How do you determine which one is dead if none have a charge?

[@user-lp7dd7dz9m]

The button top is some kind of protection for applications where there is no BMS but I guess it's harmless to use it with one.

[@keenowl1410]

It looks like you punctured the metal that keeps the electrolytes or lithium. Did you smell a sweet smell? If so are the batteries broken at that point? I have had the metal on the flat negative almost always have a pin size puncture and release a sweet smell. I find it easier to just leave the nickel tabs cut short on that side and not rip them off. What are your thoughts?

[@douglasbarr2636]

Why is there no circuit board. Do I need one of I replace with newer cells

[@jimfrisby3623]

Why not unsolder the connections?

[@martinadkins9800]

Hello Dusty can you tell me what spot welder you used it seems to be a nice small one that works pretty well.

[@mikecolletta7527]

I knew there were 18650’s in them, they seem to power everything! I heard Teslas run off them as well!

[@willamcarriveau3811]

So you use different batteries on 5 Amp batterie

[@Gollammeister]

What dewalt should offer is a battery pack renewal service where they test a battery remove old cells replace with brand new ones retest to ensure it’s fully safe usable charges discharges at safe rates etc job done

[@nllandry]

Did you diagnose that you need to change all of the batteries? Maybe only a couple needed changing. I’ve got an 8ah battery I’m going to have to do this to, I’d rather keep as many original batteries as possible but I also have to find the couple cells that are bad.

[@babybeeapiaries8667]

They make flat head batteries, those would work also available at 18650.

[@tektao_8230]

Great run thru but try not to use trash cells to replace them, that's a poor quality cell. To anybody seeing this try Samsung 30Q 18650 at 15A continious discharge at 3000mah or better yet just buy the exact same batteries it was made with and you will get the exact same glorious battery back.