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#533363 - 15th Jun 2011 11:40am battery packs
bazzoh Offline

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Registered: 25th Oct 2007
Posts: 252
Loc: wirral
hello!
do we know of anyone who can build battery packs - similar to what's in rc cars? i've got 2 12v torches (military spec) which are rechargeable, and simply can't afford the price they want! (cheapest so far is 60 for 1 pack!)
anyone with any ideas?
baz

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#533389 - 15th Jun 2011 12:13pm Re: battery packs [Re: bazzoh]
diggingdeeper Offline

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Registered: 9th Jul 2008
Posts: 10001
Loc: Birkenhead
PM sent
_________________________
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell

When the debate is lost, slander becomes the tool of the loser. Socrates

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#533424 - 15th Jun 2011 2:46pm Re: battery packs [Re: bazzoh]
Snodvan Offline

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Registered: 19th Mar 2008
Posts: 1258
Loc: Wallasey Village
Would also be nice if some enterprising Wiki-er could rebuild battery packs for rechgargeable handtools.

How many of us have a (mechanically) perfectly battery drill in the toolbox but the damned thing will no longer hold charge for more than a 5 minute job? I have TWO such drills. Because they are mechanically sound I am just too mean to throw them (and the chargers)in the bin

While you can get replacement battery packs for posh kit like DeWalt etc (at a heck of a price) there is no chance for a Black & Decker or a PowerCraft. I could not even get spares for a Bosch drill

Potential business here I suspect

Snod
_________________________
5 Precepts of Buddhism seem appropriate. Refrain from taking life. Refrain from taking that which is not given. Refrain from misconduct. Refrain from lying. Refrain from intoxicants which lead to loss of mindfulness

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#533426 - 15th Jun 2011 2:48pm Re: battery packs [Re: bazzoh]
bazzoh Offline

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Registered: 25th Oct 2007
Posts: 252
Loc: wirral
i like your thinking snods! ...anyone?? haha

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#533603 - 15th Jun 2011 6:08pm Re: battery packs [Re: Snodvan]
diggingdeeper Offline

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Registered: 9th Jul 2008
Posts: 10001
Loc: Birkenhead
Originally Posted By: Snodvan
Would also be nice if some enterprising Wiki-er could rebuild battery packs for rechgargeable handtools.
I've done this many times, biggest problem is that most of them have NICADS in them which inherently have problems because of there memory effect. Often the packs are fast-charged but without proper thermal protection which means some cells get too hot and are destroyed. The batteries are connected in series and hence charged in series, any imbalance in one cell will magnify the memory effect problems.

If you replace them with NiMH batteries they are easily destroyed as well because they are very intolerant to overcharging at faster charge rates.

The real answer would be that manufacturers revert back to using standard generic cells that can be charged and tested individually - but of course that would reduce their re-sell rate enormously.
_________________________
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell

When the debate is lost, slander becomes the tool of the loser. Socrates

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#533659 - 15th Jun 2011 7:48pm Re: battery packs [Re: bazzoh]
Snodvan Offline

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Registered: 19th Mar 2008
Posts: 1258
Loc: Wallasey Village
DD

Last time I priced appropriate battery cells (ideally tag-end to make connections easier) the cost to rejuvenate my drill was more than the cost of buying a new drill.

THAT can only mean that a mere mortal like me cannot buy cells as cheaply as the manufacturers. If I bought cells from a low cost source eg alibaba.com then I could just about break even.

Snod
_________________________
5 Precepts of Buddhism seem appropriate. Refrain from taking life. Refrain from taking that which is not given. Refrain from misconduct. Refrain from lying. Refrain from intoxicants which lead to loss of mindfulness

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#533686 - 15th Jun 2011 8:22pm Re: battery packs [Re: bazzoh]
diggingdeeper Offline

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Registered: 9th Jul 2008
Posts: 10001
Loc: Birkenhead
Yes, they are a bit dear, I used to buy in bulk (50 to 200 at a time). Usual size of cells and are between 1.50 and 2.00 each at the moment - eight cells and your looking at up to 16
_________________________
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell

When the debate is lost, slander becomes the tool of the loser. Socrates

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#533710 - 15th Jun 2011 8:49pm Re: battery packs [Re: bazzoh]
Snodvan Offline

Forum Addict

Registered: 19th Mar 2008
Posts: 1258
Loc: Wallasey Village
And the last battery drill I bought was 14 from Netto!

Yep, it will be knackered (battery) in a year or two - and I guess it will go into the box with the other dead ones. I have to say that for 14 it is a very reasonable drill. Obviously no hammer action etc, but it all works for what I want.

Snod
_________________________
5 Precepts of Buddhism seem appropriate. Refrain from taking life. Refrain from taking that which is not given. Refrain from misconduct. Refrain from lying. Refrain from intoxicants which lead to loss of mindfulness

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#533722 - 15th Jun 2011 8:59pm Re: battery packs [Re: bazzoh]
diggingdeeper Offline

Wiki Master

Registered: 9th Jul 2008
Posts: 10001
Loc: Birkenhead
You can get the cells from abroad a lot cheaper, but lead time does my head in.
_________________________
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell

When the debate is lost, slander becomes the tool of the loser. Socrates

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#533762 - 15th Jun 2011 9:51pm Re: battery packs [Re: bazzoh]
chris_gilly Offline

Forum Addict

Registered: 15th Feb 2009
Posts: 1950
Loc: tranmere
i have a battery for my impact gun which i dropped and its stopped working, care to try and fix it dd? i will pay smile

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#533763 - 15th Jun 2011 9:54pm Re: battery packs [Re: bazzoh]
diggingdeeper Offline

Wiki Master

Registered: 9th Jul 2008
Posts: 10001
Loc: Birkenhead
@Chris, Sure mate, I'll pop down tomoz, I need to see you anyway
_________________________
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell

When the debate is lost, slander becomes the tool of the loser. Socrates

Top
#533765 - 15th Jun 2011 9:57pm Re: battery packs [Re: bazzoh]
chris_gilly Offline

Forum Addict

Registered: 15th Feb 2009
Posts: 1950
Loc: tranmere
ok buddy, sure you'd like to see my new project anyway wink

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#533766 - 15th Jun 2011 9:58pm Re: battery packs [Re: bazzoh]
diggingdeeper Offline

Wiki Master

Registered: 9th Jul 2008
Posts: 10001
Loc: Birkenhead
Sounds interesting!
_________________________
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell

When the debate is lost, slander becomes the tool of the loser. Socrates

Top
#533767 - 15th Jun 2011 10:00pm Re: battery packs [Re: bazzoh]
chris_gilly Offline

Forum Addict

Registered: 15th Feb 2009
Posts: 1950
Loc: tranmere
1976 and air cooled wink

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#533770 - 15th Jun 2011 10:05pm Re: battery packs [Re: bazzoh]
diggingdeeper Offline

Wiki Master

Registered: 9th Jul 2008
Posts: 10001
Loc: Birkenhead
911E?
_________________________
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell

When the debate is lost, slander becomes the tool of the loser. Socrates

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