balidey
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| posted on 19/1/10 at 10:00 AM |
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3.0ah batteries into 1.3ah drill OK?
OK, electrics is not my strong point, but here is what must be a basic question to you lot.
If I were to buy one of the £99 Makita 18V drill deals with 1.3ah batteries, would that drill be able to accept the 18V 3.0ah batteries? Would the
charger be the same? (I am talking about the Ni-cad and Ni-mh batteries only here)
I have tried looking for this info but can't seem to get a clear answer.
As a slightly off topic question. There must be loads of Makita drills about using the 'old' Ni-cad and Ni-mh batteries. If someone made
an adapter that sat between a Li-ion battery and the Ni-mh drill then surely that would give you a converted Li-ion drill? Would mean not having to
buy a whole new drill just to get the latest in battery technology.
And surely a simple adapter would be fairly easy and cheap to make. Obviously Makita won't want to produce it as it will limit their Li-ion
drill sales.
[Edited on 19/1/10 by balidey]
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Mr Whippy
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| posted on 19/1/10 at 10:15 AM |
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Makes absolutely no difference to the drill except one pack will last longer. The charger on the other hand will require more than twice as long to
charge the larger capacity ones, indeed 2.3 times as long, it will still tell you correctly that they are charged as it does that by voltage.
[Edited on 19/1/10 by Mr Whippy]
Fame is when your old car is plastered all over the internet
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balidey
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| posted on 19/1/10 at 10:16 AM |
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Thankyou for that confirmation.
I was a bit worried the increased amps would affect the drill, but its not amps is it? Its amp hours. So I probably could have answered my own
question. Duh.
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Mr Whippy
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| posted on 19/1/10 at 10:18 AM |
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quote:
Originally posted by balidey
Thankyou for that confirmation.
I was a bit worried the increased amps would affect the drill, but its not amps is it? Its amp hours. So I probably could have answered my own
question. Duh.
yip, you'd need a larger motor to draw more amps
Fame is when your old car is plastered all over the internet
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02GF74
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| posted on 19/1/10 at 10:29 AM |
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yes, capacity is amp/hours not amps.
but note with a drill, if you are using it hard i.e., for a long time making big holes in hard material, it will consume a lot of current.
with a lower capacity battery, it will struggle to supply the power, the voltage will drop (same as what happens when you crank an engine over using
different sized batteries) so the power going to the drill will be less than when using a higher capacity cell.
There will be some power wasted, ending up as heat inside the drill so you are more likely to damage the drill.
in other words, the lower capacity battery is limiting the power than can go to the drill.
If you are a sympathetic user allowing the drill to rest and cool down, then you should have no problems.
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dhutch
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| posted on 19/1/10 at 10:55 AM |
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Also, potentially, NiMH batteries need a slightly diffrent charge profile to NiCd's hence there is an outside chance makita have made the
fittings on the batterys diffrent. Although they car good for compatibility and might well not have done.
If they physically you probably fine however as said, particularly if you respect the fact you just put a higher performance pack in the same drill
and as 02GF74 says, give it a rest sometimes before it gets to be melting hot! (standard practice really)
Daniel
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petercd
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| posted on 19/1/10 at 05:23 PM |
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the most important thing to remember when hacking batt powered items is to use the charger that was designed for the batt tech.
never use a standard charger on a Li-on batt, these are liable to burst into flame when abused with a fixed current charger as used on lead acid or
nicad batts.
also using a nicad charger on a nimh batt with overheat the batt pack leading to a much shorter lifespan of the batt.
otherwise as mentioned above, you basically will get extended use of the tool before needing a recharge.
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Valtra
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| posted on 24/1/10 at 08:11 PM |
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Draper lion use a different charger which will charge other types of Batt. but you cant' charge Lion with a Nicd or nimh charger
"If it looks like it works and it feels like it works, then it works"
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