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Default O/T(ish) B&D 12v batteries and charging

Having noted that my trusty old B&D 12v drill/driver and 12v combi are
starting to lose some battery longevity I had a quick Google to see how much
a replacement might be.

About £30.

Since you can buy a new 18V combi (albeit not a particularly special one)
for under £40 this does not seem to make economic sense.

I also can't seem to find a fast/trickle charger which would allow me to eke
the best remaining performance out of the current batteries.

One major problem with lower end drills is the 3+ hours to charge plus the
requirement to then take them out of the charger after the 3 hours to avoid
damage.
Combined with the requirement to discharge the battery as far as possible
before recharging this does give all sorts of useability issues.

If I could find a reasonable trickle charger I might consider buying one
more batttery to keep two drills going as the batteries are interchangeable.
However I can't seem to find anything via Google so far.

It has been suggested that if I made up an adapter I could use my Site
(Makita) charger which is rated on the front as 7.2 - 18V.
Does anyone know how good these chargers are at sensing the fully charged
voltage of battery packs?
It looks feasible to cut the wire leading from the wallwart of one of my two
12V chargers (in the middle to allow reconnection if required) and then
connect to another lead which fits into the Site charger but I wouldn't want
to go through all the hassle of making up a connector to the Site charger
just to fry a battery.

I am assuming that the B&D 12V charger is a simple arrangement of a 240V/12V
wallwart and then a thin wire which takes the 12V to the adapter which fits
the battery pack.
If there is more intelligence in the adapter which the battery pack clips
into then the solution may not work.

Any information appreciated.

Also, would a motor cycle 12V trickle charger work if connected to the
battery pack?

Cheers

Dave R

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No plan survives contact with the enemy.

Helmuth von Moltke the Elder

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Default O/T(ish) B&D 12v batteries and charging

David WE Roberts wrote:
Having noted that my trusty old B&D 12v drill/driver and 12v combi are
starting to lose some battery longevity I had a quick Google to see how
much a replacement might be.

About £30.

Since you can buy a new 18V combi (albeit not a particularly special
one) for under £40 this does not seem to make economic sense.


however the replacement batteries may well be beter than the originals.

Also at least 75% of the cost of a cordless is in the batteries. The
motors are cheap mass produced chinese junk, as are the gears and
bearings. there is not a lot left.

If the cordless is of good quality and in good condition, re battery it
for a much BETTER tool.

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Default O/T(ish) B&D 12v batteries and charging

On Tue, 8 Jun 2010 13:42:27 +0100, David WE Roberts wrote:

One major problem with lower end drills is the 3+ hours to charge plus
the requirement to then take them out of the charger after the 3 hours
to avoid damage.


Find a motor driven time switch. Open it up and connect the motor
after the switch contacts. Plug the charger into it and set to run
for 3hrs (or whatever) when it switches off the charger and it stops.

Simples.

--
Cheers
Dave.



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Default O/T(ish) B&D 12v batteries and charging

Dave Liquorice wrote:
On Tue, 8 Jun 2010 13:42:27 +0100, David WE Roberts wrote:

One major problem with lower end drills is the 3+ hours to charge plus
the requirement to then take them out of the charger after the 3 hours
to avoid damage.


Find a motor driven time switch. Open it up and connect the motor
after the switch contacts. Plug the charger into it and set to run
for 3hrs (or whatever) when it switches off the charger and it stops.

Simples.

better still but a decent 'delta peak' nickel cell charger from a model
shop.

charge times around 20 minutes are the norm: faster than that overheats
the cells a tad.



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Default O/T(ish) B&D 12v batteries and charging

On Jun 8, 1:42*pm, "David WE Roberts"
wrote:

Having noted that my trusty old B&D 12v drill/driver and 12v combi are
starting to lose some battery longevity I had a quick Google to see how much
a replacement might be.

About 30.

Since you can buy a new 18V combi (albeit not a particularly special one)
for under 40 this does not seem to make economic sense.

I also can't seem to find a fast/trickle charger which would allow me to eke
the best remaining performance out of the current batteries.

One major problem with lower end drills is the 3+ hours to charge plus the
requirement to then take them out of the charger after the 3 hours to avoid
damage.
Combined with the requirement to discharge the battery as far as possible
before recharging


no need for that. in fact its wha causes most damage


this does give all sorts of useability issues.

If I could find a reasonable trickle charger I might consider buying one
more batttery to keep two drills going as the batteries are interchangeable.
However I can't seem to find anything via Google so far.


making one's trivial, albeit usually unnecessary


It has been suggested that if I made up an adapter I could use my Site
(Makita) charger which is rated on the front as 7.2 - 18V.
Does anyone know how good these chargers are at sensing the fully charged
voltage of battery packs?
It looks feasible to cut the wire leading from the wallwart of one of my two
12V chargers (in the middle to allow reconnection if required) and then
connect to another lead which fits into the Site charger but I wouldn't want
to go through all the hassle of making up a connector to the Site charger
just to fry a battery.

I am assuming that the B&D 12V charger is a simple arrangement of a 240V/12V
wallwart and then a thin wire which takes the 12V to the adapter which fits
the battery pack.


no no!


If there is more intelligence in the adapter which the battery pack clips
into then the solution may not work.


the charger needs some basic control first, a vanilla wallwart wont
have that. No intelligence needed to trickle.


Any information appreciated.

Also, would a motor cycle 12V trickle charger work if connected to the
battery pack?


no!


NT
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