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battery packs #533363
15th Jun 2011 10:40am
15th Jun 2011 10:40am
Joined: Oct 2007
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bazzoh Offline OP

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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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Re: battery packs [Re: bazzoh] #533389
15th Jun 2011 11:13am
15th Jun 2011 11:13am
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Birkenhead
diggingdeeper Offline

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PM sent


We don't do charity in Germany, We pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn
Re: battery packs [Re: bazzoh] #533424
15th Jun 2011 1:46pm
15th Jun 2011 1:46pm
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Snodvan Offline

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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
Re: battery packs [Re: bazzoh] #533426
15th Jun 2011 1:48pm
15th Jun 2011 1:48pm
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bazzoh Offline OP

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i like your thinking snods! ...anyone?? haha

Re: battery packs [Re: Snodvan] #533603
15th Jun 2011 5:08pm
15th Jun 2011 5:08pm
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Birkenhead
diggingdeeper Offline

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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.


We don't do charity in Germany, We pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn
Re: battery packs [Re: bazzoh] #533659
15th Jun 2011 6:48pm
15th Jun 2011 6:48pm
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Wallasey Village
Snodvan Offline

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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
Re: battery packs [Re: bazzoh] #533686
15th Jun 2011 7:22pm
15th Jun 2011 7:22pm
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Posts: 14,023
Birkenhead
diggingdeeper Offline

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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


We don't do charity in Germany, We pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn
Re: battery packs [Re: bazzoh] #533710
15th Jun 2011 7:49pm
15th Jun 2011 7:49pm
Joined: Mar 2008
Posts: 1,355
Wallasey Village
Snodvan Offline

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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
Re: battery packs [Re: bazzoh] #533722
15th Jun 2011 7:59pm
15th Jun 2011 7:59pm
Joined: Jul 2008
Posts: 14,023
Birkenhead
diggingdeeper Offline

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You can get the cells from abroad a lot cheaper, but lead time does my head in.


We don't do charity in Germany, We pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn
Re: battery packs [Re: bazzoh] #533762
15th Jun 2011 8:51pm
15th Jun 2011 8:51pm
Joined: Feb 2009
Posts: 1,952
tranmere
chris_gilly Offline

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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

Re: battery packs [Re: bazzoh] #533763
15th Jun 2011 8:54pm
15th Jun 2011 8:54pm
Joined: Jul 2008
Posts: 14,023
Birkenhead
diggingdeeper Offline

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@Chris, Sure mate, I'll pop down tomoz, I need to see you anyway


We don't do charity in Germany, We pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn
Re: battery packs [Re: bazzoh] #533765
15th Jun 2011 8:57pm
15th Jun 2011 8:57pm
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Posts: 1,952
tranmere
chris_gilly Offline

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ok buddy, sure you'd like to see my new project anyway wink

Re: battery packs [Re: bazzoh] #533766
15th Jun 2011 8:58pm
15th Jun 2011 8:58pm
Joined: Jul 2008
Posts: 14,023
Birkenhead
diggingdeeper Offline

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Sounds interesting!


We don't do charity in Germany, We pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn
Re: battery packs [Re: bazzoh] #533767
15th Jun 2011 9:00pm
15th Jun 2011 9:00pm
Joined: Feb 2009
Posts: 1,952
tranmere
chris_gilly Offline

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1976 and air cooled wink

Re: battery packs [Re: bazzoh] #533770
15th Jun 2011 9:05pm
15th Jun 2011 9:05pm
Joined: Jul 2008
Posts: 14,023
Birkenhead
diggingdeeper Offline

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diggingdeeper  Offline

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Birkenhead
911E?


We don't do charity in Germany, We pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn

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