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Sick of Cordless Power Tool Battery Technology Changes?

Discussion in 'Electronic Design' started by D from BC, Jun 12, 2007.

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  1. D from BC

    D from BC Guest

    Ever need to replace that 12V battery in that old cordless tool?
    Then toss it in the garbage because the new 18v tools make the 12V
    tools seem dated.

    I propose a new product to save all cordless tools from the switcheroo
    incompatible non-cross battery game.

    It's a power supply with various settings..but here's the cool
    It comes with cheap set of adapters that fit all popular power tools
    such as Black and Decker, Mikita, Ryobi etc..
    No just turns the cordless tool into a corded.

    Unit is probably cheaper than a replacement battery or spare battery.
    Fits many tools...Perhaps includes a hack kit.
    Use the power supply if you run out of charged batteries.
    Use the power supply with cheap flea market power tools with dead or
    missing batteries.
    D from BC
  2. krw

    krw Guest

    Why? Corded tools cost 1/5 what cordless tools do. There is a
    REASON I spend the money.
    Rebuilding batteries is much cheaper than buying replacements. I
    just sent a 14.4V Porter Cable batter in for rebuild; $35.
    Have you actually looked at the connector on the tools?
    All sane people have at least two batteries.
    Not going to sell.
  3. D from BC

    D from BC Guest

    I haven't worked out all the details but I really think its possible.
    Give it some time..Somebody will probably start making this and
    selling it on Ebay..

    I already have a cordless rotary tool, cordless drill and a cordless
    screwdriver...Well they're not cordless anymore.. They all have cords
    and plug into a variable power supply.
    Why...all these tools are old and have dead batteries.
    The battery replacement is a pita..

    Now I have:
    No charging
    No swapping batteries
    No dumbass chargers cooking the batteries
    No battery babysitting
    No out of power interruptions
    And the tools are lighter!

    It's wonderful! :)
    D from BC
  4. I've saved some spent Milwaukee 18V battery packs. They are nothing more
    than standard C size NiCads strapped together in series. That would be a
    do-it-yourself rebuild, except I think the shops that do it get a better
    price than I can on cells.
    Yep. And I've got spares for my power tools as well. ;-)
  5. (David P.)

    (David P.) Guest


    Then it'll be 50% more crowded than it is now.
    Will you and your ilk step forward and invite people
    from 3rd world countries to move into your neigh-
    borhoods until they're 50% more crowded than they
    are now? We somehow doubt it!

    See above, argument loser!
  6. Ross Herbert

    Ross Herbert Guest

    All you are saying is that you are "recycling" your old battery
    powered tools because you can't afford, or can't be bothered replacing
    the battery. While this is admirable, it does sort of negate the whole
    reason for buying a battery powwered tool in the first place. ie, to
    avoid having to drag a power cord around wherever the tool is used.
    Your solution not only re-imposes that condition but it also adds an
    additional piece of hardware - the power supply unit. Now you have to
    drag around the cord and the power supply as well. Also, in order to
    avoid dramatic power loss, the cord from the power supply to the tool
    must be less than about 2 metres in length which means that you may
    have to perch your PSU on a ladder when drilling at ceiling height
    above the floor or, where the length of cord won't allow sufficient
    reach. Hardly a safety concious approach...
  7. Jasen

    Jasen Guest

    a mains powered tool will typically work much better than the battery one.
    eg 1200RPM from 0.25" a battery drill and 8000RPM from a 0.25" corded drill,
    and yeah the corded drill does drill holes 6 times easier.

  8. krw

    krw Guest

    I'm hoping they are better at opening and resealing the case than I
    could be, as well.
    I've got spare power tools for my power tools. ;-)
  9. My Milwaukee packs are closed with half a dozen screws. Opening and
    resealing them is so simple I think they may have designed them with
    rebuilding in mind. Something to look for when selecting a brand of
  10. krw

    krw Guest

    It is, now that I know such a thing exists. Another useful feature
    I'll be looking for next time is easily replaced (accessible without
    opening the case) brushes.
  11. joseph2k

    joseph2k Guest

    Can't speak about your power tools but the batteries in my battery operated
    tools cannot be charged while in the tool. They have to be removed to be
  12. krw

    krw Guest

    The OP's proposed power tool has no batteries (anymore) thus they
    aren't being charged. ;-)
  13. Guest

    On Jun 11, 9:47 pm, D from BC
    I never understood the attraction of cordless tools for an homeowner,
    for all the above reasons, so I never considered buying them in the
    first place. Cordless electric shavers are even a bigger mystery to

    I do have a cordless weedwacker, your moving over a large distance
    outside very quickly, now that makes sense to be cordless (or gas
    powered), but a cordless shaver?
    Maybe they should market a gas powered shaver too, just as useless....
  14. Phil Allison

    Phil Allison Guest


    ** A cordless, electric screwdriver is very convenient - never any need
    for long extension cables.

    ** They are electrically safe even when wet, you can shave anywhere in or
    out of the house.

    ....... Phil
  15. Joel Kolstad

    Joel Kolstad Guest

    You might try a few cordless tools yourself and find that you like them. They
    really are more convenient than getting a cord out any time you're going to
    need to be drilling/cutting/etc...

    Cordless electric shavers are nice in that there isn't a cord that tries to
    sweep other items on your vanity off onto the floor :), you can wander around
    the house to get back to watching the news, starting the coffee, etc.

    For professional carpenters, I think you could perform a time-in-motion study
    and demonstrate that cordless tools increase productivity more than enough to
    offset the increased price.

    Remember the old wind-up shavers?
  16. D from BC

    D from BC Guest

    I'm not totally against cordless tools..
    I'm just picking on the batteries.

    How about a tool battery pack with easy to change size C NiMH or NiCd
    Over the years there's been model changes, multiple cordless tool
    makers and battery voltage changes.

    I did a quick search..
    Makita 6935 14.4V volt lithium ion
    Bosch PS20-2 10.8Volt
    Dewalt DC759 18Volt
    Panasonic EY6432 15.6Volt
    Dewalt DCX640 Lith Ion 36Volt
    Black and Decker XD1200 12Volt
    Dewalt DW920K-2 7.2Volt

    Someday I'm going to see all these tools in a flea for cheap because
    the owners tossed away the tools to switch to other voltages.

    This is why I thought of making a variable power supply to bring these
    batteryless tools back to life.

    I've installed power jacks on 3 batteryless cordless tools.. Works
    D from BC
  17. Joel Kolstad

    Joel Kolstad Guest

    Hi D,

    I think your idea of a universal battery adapter for cordless power tools
    would sell, although it's not clear to me if it would be in such quantities
    that you'd be able to make any money at it. :) The tools almost always comes
    with batteries, so you're looking at the battery replacement market. Folks
    like DeWalt do charge enough for batteries (often $50-$100) that people will
    seek out alternatives, but the big stores like Home Depot already address that
    concern with their own Ryobi line of tools that uses cheap ($30?) batteries
    with the tools costing less to begin with as well.

    There *are* a handful of universal *chargers*, where you use different inserts
    (or they have a quite convoluted multi-purpose mold custom made) to match up
    the battery you want to charge.
    For stuff like Black and Decker, yes. For the better quality stuff like
    DeWalt (which is just high-end B&D these days), there's a thriving market on
    eBay... and quite often people will comment on whether the batteries included
    are pretty much dead, new, etc.
    There was one manufacturer... Skill, perhaps?... that had a line of cordless
    tools where they included a battery-shaped "pack" with a power cord coming off
    of it that would power the tool if your last charged battery was spent (i.e.,
    the "pack" was actually a little switching power supply). Seemed like a good
    idea, although I don't think it ever caught on.

  18. Jim Yanik

    Jim Yanik Guest

    At one time,Hitachi also offered a hi-capacity belt-mounted battery pack
    and a coiled-cord adapter to fit one of their drills.
    I would like to see cordless tool makers (or aftermarket) make Li-ion
    battery packs and chargers for older tools that used NiCds or NiMH packs.
    It seems that a 14.4 volt tool could run on either Li-ion (4 cells)or the
    other chemistries,and I suspect my 9.6V Makita drill could run on a 10.8
    volt Li-ion pack (3 cells)without problems.
    18 volt Li-ion tools would use 5 cells.
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