Introduction: Drill Battery Rebuild - NiCd to Lithium

Picture of Drill Battery Rebuild - NiCd to Lithium

Drill/ screwdriver battery rebuild to Lithium using battery holder for 18650 cells (so no spot welding needed) and BMS. After rebuild original charger can be used for charge.

Part list:

  • Battery holder for 18650 size batteries
  • 3x Sony VTC4 18650 2100mAh 30A batteries
  • BMS to control charge/ discharge

Step 1: Soldering

Picture of Soldering

At first I soldered wires to battery holder, after that soldered BMS board and battery pack plug

BMS was glued to battery holder using double sided tape

Step 2: Fitting

Picture of Fitting

Little bit of cutting and now batteries fit battery pack case

Then secured using electrical tape

Check fit, done

Step 3: Charging

Picture of Charging

As BMS was used, original charger can be used for charging

Step 4: Finished

It was quick and simple battery pack rebuild

Screwdriver works as expected


carlozousa (author)2017-11-13

Congratulations for this awesome instructable. The only snag is that this only works when the drill charger is not intelligent ...

russ_hensel (author)2017-11-06

Just a note to let you know I have added this to the collection: Cordless-Drill-Battery-Maintenance !


Take a look at a bunch of different/similar approaches to this project.

And for even more drill info:


tedjuuh19 (author)2017-11-06

Never mind, just found it on the photo. thanks for this instructable btw!:)

tedjuuh19 (author)2017-11-06

Do you have a link or a part number of the BMS that you used?

About This Instructable




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