soldering AAA batteries

[dowronger]

It’s a joke

Cordless drills typically have a two speed gearbox. When the tradesman works on price, he uses the high speed gear to get done sooner and hence make more profit. When he works on a day rate he uses the low speed gear to elongate the job and make more profit

I leave my drill on slow setting allways! I think it prelongs the life of it and gives it more torque. though I could be wrong!

 

[JohnW2]

It’s a joke .... Cordless drills typically have a two speed gearbox. When the tradesman works on price, he uses the high speed gear to get done sooner and hence make more profit. When he works on a day rate he uses the low speed gear to elongate the job and make more profit

Thanks! I have to say that I've come across a good few tradesmen who are very capable of slowing down, and hence making a job more protracted without having to invoke any sort of switch Perhaps 'worse', some are equally capable of speeding up, with a potential consequence in terms of quality of work, when it's in their financial interest to get the job completed as quickly as possible!

 

[JohnW2]

Cordless drills typically have a two speed gearbox.

I've often wondered what those switches actually do. They are usually 'electrical switches', so not a "two speed gearbox" per se, so I guess it's just a question of motor speed - but I'm not sure of the consequence in terms of torque.

I generally just use the 'high speed' for drilling small holes and the 'low speed' for larger holes and use as a screwdriver (although I often forget to alter the switch!).

 

[dowronger]

I've often wondered what those switches actually do. They are usually 'electrical switches', so not a "two speed gearbox" per se, so I guess it's just a question of motor speed - but I'm not sure of the consequence in terms of torque.

More likley they will have a resistor in it John

 

[JohnW2]

More likley they will have a resistor in it John

Very possibly - I didn't suggest otherwise. I merely pointed out that it is usually an 'electrical switch', rather than anything to do with a 'two speed gearbox'. The immediate effect of operating the switch is certainly to change the speed.

 

[dowronger]

Very possibly - I didn't suggest otherwise. I merely pointed out that it is usually an 'electrical switch', rather than anything to do with a 'two speed gearbox'. The immediate effect of operating the switch is certainly to change the speed.

But it could also be a switch that opporates a gear box john

 

[JohnW2]

But it could also be a switch that opporates a gear box john

Extremely unlikely. If it were operating a solenoid which was mechanically 'changing the gear' of a gearbox, there would be, at the least, a substantial 'clunk', which there definitely isn't

 

[morqthana]

Re your second sentence, it ignores time so …If Battery B can do more work in the same amount of time as Battery A, then it is more powerful.

You're missing the point. People do not talk in precisely defined technical terms.

If Battery B can do more work than Battery A, irrespective of time then it is far from unreasonable to say that it is more powerful.

 

[spile]

You're missing the point. People do not talk in precisely defined technical terms.

If Battery B can do more work than Battery A, irrespective of time then it is far from unreasonable to say that it is more powerful.

Agree with second sentence, disagree with first and third.

A battery power rating determines what it can actually start or operate, whereas its work capacity only determines how long it can operate it.

 

[ebee]

It’s a joke

Cordless drills typically have a two speed gearbox. When the tradesman works on price, he uses the high speed gear to get done sooner and hence make more profit. When he works on a day rate he uses the low speed gear to elongate the job and make more profit

Ohhh LOL

 

[robinbanks]

I leave my drill on slow setting allways! I think it prelongs the life of it and gives it more torque. though I could be wrong!

If you haven’t already, buy a trade-grade drill; my Bosch pro can wind screws in on high speed that my cheaper brand one can’t even drive on low speed

The only time I’ll drop to speed 1 on my Bosch is when I’m driving eg a 6x150mm or longer

I've often wondered what those switches actually do.

On every decent cordless I’ve ever used they’re a physical gearbox; the drill makes the same noise at the same pitch when the trigger is fully squeezed but there is an obvious drive difference. There is also a heavy clunk when you operate the switch and if you can even operative it while the drill is running, a crunch and a change in the chuck speed but no pitch change from the motor. If it were electrical its effect would be very different

Have regard to, for example

DeWalt DCD777 Cordless Drill Spare Parts - Part Shop Direct

DeWalt DCD777 Cordless Drill Spare Parts - Part Shop Direct

www.partshopdirect.co.uk

Item 23 is a “gear”, and there are no wires anywhere near the entire unit in which the gear is housed, yet the wires that drive the drill motor are clearly shown. 100% physical gearbox on a decent drill

A battery power rating determines what it can actually start or operate, whereas its work capacity only determines how long it can operate it.

You’ve defined your terms, and can now be clearly communicated with using those terms, but don’t expect the world to use your definition. Instead, define terms ahead of or during every conversation unless you’re certain the other party already uses them

 

[SUNRAY]

Agree with second sentence, disagree with first and third.

A battery power rating determines what it can actually start or operate, whereas its work capacity only determines how long it can operate it.

Some will have opposite views on this.
For a start many batteries are now rated in Wh, does that alone not demonstrate a 1440Wh (120Ah in car battery terms) battery is more powerful than a 720Wh (60Ah in car battery terms) battery?

As an example (in very basic terms ingoring the methods of voltage drop used to establish capacity) the 12V 60Ah battery can supply say 3A or 36W for 20 hours but the more powerful 120Ah version can supply 6A/72W or twice the power for the same time.

If exactly the same techniqes and construction methods are used to make the above 60 & 120Ah car batteries then: using your description it's fair to say there will be twice the power and twice the capacity.... The two tend to go hand in hand for similar products.

 

[ericmark]

I have a number of units which all use the same batteries, gardening tools, multi-tools, drills, the last one was an angle grinder, the batteries are available as 2, 4, and higher amp hour ratings, and with the gardening tool using two batteries at a time, the 2 Ah gives a good balance to the tool, and at 40 volts, it does have enough grunt to do the job.

But the angle grinder only uses one battery, and it also uses a lot of power, so I bought a 4 Ah version of the batteries. The odd thing is nearly the same weight and size to the 2 Ah version, it also has Bluetooth to tell my phone its state of charge, and will allow me to set discharge and charge rates, and counts how many times it has been charged. Not a clue why, but it does mean if I buy a second I will be able to use my gardening tool for far longer.

At the moment I could easy in error fit a 2 Ah and 4 Ah in the garden tool, which I assume could damage the 2 Ah battery? Maybe no one remembered there was a tool that could use two batteries?

 

[JohnW2]

On every decent cordless I’ve ever used they’re a physical gearbox; the drill makes the same noise at the same pitch when the trigger is fully squeezed but there is an obvious drive difference. There is also a heavy clunk when you operate the switch and if you can even operative it while the drill is running, a crunch and a change in the chuck speed but no pitch change from the motor. If it were electrical its effect would be very different

Interesting. My first reaction was to think that perhaps I haven't experienced any 'decent' ones. However, I'll have a play with what (probably 'non-decent') ones I have immediately to hand and will report back!

You’ve defined your terms, and can now be clearly communicated with using those terms, but don’t expect the world to use your definition. Instead, define terms ahead of or during every conversation unless you’re certain the other party already uses them

Quite so. 'Clear and unambiguous communication' is only possible when one is sure that both parties are on the same page as regards definitions/terminology - and that is often not the case when the conversation is between members of the general public and those with 'technical knowledge' in the discipline concerned.

 

[JohnW2]

At the moment I could easy in error fit a 2 Ah and 4 Ah in the garden tool, which I assume could damage the 2 Ah battery?

How/why do you think that could be the case?