Drill Battery Rebuild - NiCd to Lithium

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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

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

Little bit of cutting and now batteries fit battery pack case

Then secured using electrical tape

Check fit, done

Step 3: 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

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    7 Discussions

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    aliasfoxruss_hensel

    Reply 1 year ago

    That link on another instructable is actually how I got here. Great collection! Thanks.

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    aliasfox

    1 year ago

    Question: Say I did this on a Craftsman 19.2 Drill battery, would a Craftsman Multi-Chemistry charger (for Lithium Ion and NiCd batteries) work for the modified battery (to revive a few "dead" ones I have but also to move to lithium). I was considering getting a kit that comes with 2 "real" lithium batteries and a multi-chemistry charger.. and "upgrading" several "dead" batteries I have but I also have 1 or 2 NiCd batteries that still work. Thanks

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    carlozousa

    1 year ago

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

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    tedjuuh19

    1 year ago

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

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    tedjuuh19

    1 year ago

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