fudd Posted November 14, 2012 Report Share Posted November 14, 2012 Morning all. I have a NiMH battery that wont take a charge. Is there a way of refreshing it? A new one is about a £100 so i dont want to just lob it. Thanks Steve P. Link to comment Share on other sites More sharing options...
larkshall Posted November 14, 2012 Report Share Posted November 14, 2012 There is a way of revitalising Nicad batteries, but I'm not sure the same method is ok for NIMH. I can't remember the specifics of how it is done (Check Youtube). Someone did some battery packs as used in portable electric drills using my Welding transformer, but I wasn't around when he did them. To all accounts the batteries were still working 2 years later. Link to comment Share on other sites More sharing options...
fudd Posted November 14, 2012 Author Report Share Posted November 14, 2012 Thanks. I didn't think of YouTube. I only really go on there to listen to Gardners. Link to comment Share on other sites More sharing options...
larkshall Posted November 14, 2012 Report Share Posted November 14, 2012 Thanks. I didn't think of YouTube. I only really go on there to listen to Gardners. Gardners?, thought they just cussed the weeds and talked nicely to their plants Link to comment Share on other sites More sharing options...
by'eck Posted November 14, 2012 Report Share Posted November 14, 2012 Morning all. I have a NiMH battery that wont take a charge. Is there a way of refreshing it? A new one is about a £100 so i dont want to just lob it. Thanks Steve P. Sorry but no. They have internal circuitry that bricks them when they decide end of useful life has been reached. This to protect against explosion whilst charging dud battery which continues to draw charge current. Link to comment Share on other sites More sharing options...
owen Posted November 14, 2012 Report Share Posted November 14, 2012 Morning all. I have a NiMH battery that wont take a charge. Is there a way of refreshing it? A new one is about a £100 so i dont want to just lob it. Thanks Steve P. you can buy batteries for festool from allbatteries.co.uk i have bought them for my festool stuf and they are sound and nowhere near £100 hope this helps . By the way i agree with the post that says about refreshing dont even try it Link to comment Share on other sites More sharing options...
Proper Job Posted November 14, 2012 Report Share Posted November 14, 2012 Sorry but no. They have internal circuitry that bricks them when they decide end of useful life has been reached. This to protect against explosion whilst charging dud battery which continues to draw charge current. IIRC one of the laptop manufacturer had to recall a load of batteries because the 'brick' circuitry didn't work and the batteries where going bang? Link to comment Share on other sites More sharing options...
by'eck Posted November 14, 2012 Report Share Posted November 14, 2012 IIRC one of the laptop manufacturer had to recall a load of batteries because the 'brick' circuitry didn't work and the batteries where going bang? Yes that's true - in Japan I think. Apparently NiMh battery technology had been around for several decades before they perfected? the circuity to control them as they approached end of life. Link to comment Share on other sites More sharing options...
Gibbo Posted November 14, 2012 Report Share Posted November 14, 2012 Sorry but no. They have internal circuitry that bricks them when they decide end of useful life has been reached. This to protect against explosion whilst charging dud battery which continues to draw charge current. Lithium batteries contain such devices. I have never come across a single NiMH that contains one. And I've tested a lot of them. Yes that's true - in Japan I think. Apparently NiMh battery technology had been around for several decades before they perfected? the circuity to control them as they approached end of life. They were lithiums not NiMH. Link to comment Share on other sites More sharing options...
fudd Posted November 14, 2012 Author Report Share Posted November 14, 2012 Now I am puzzled. Can I or can't I Gibbo? Link to comment Share on other sites More sharing options...
Gibbo Posted November 14, 2012 Report Share Posted November 14, 2012 Now I am puzzled. Can I or can't I Gibbo? Yes you can. It's lithiums that brick themselves not NiMH. That's not to say it will work though, it depends how bad they are. It's also not to say they won't blow up so stand back when you do it. Link to comment Share on other sites More sharing options...
fudd Posted November 14, 2012 Author Report Share Posted November 14, 2012 Well out of all the replies, there's one constant and that's danger. I don't think I'll bother. Thanks all. Steve P Link to comment Share on other sites More sharing options...
smileypete Posted November 14, 2012 Report Share Posted November 14, 2012 (edited) Morning all. I have a NiMH battery that wont take a charge. Is there a way of refreshing it? A new one is about a £100 so i dont want to just lob it. Thanks Steve P. If the pack can't be had more cheaply, maybe get it recelled by the likes of Strikalite. Had a go at a bit of recelling myself not long ago: http://www.canalworld.net/forums/index.php?showtopic=45473&view=findpost&p=902461 cheers, Pete. ~smpt~ Edited November 14, 2012 by smileypete Link to comment Share on other sites More sharing options...
by'eck Posted November 14, 2012 Report Share Posted November 14, 2012 Lithium batteries contain such devices. I have never come across a single NiMH that contains one. And I've tested a lot of them. They were lithiums not NiMH. Apologies I got my NiMH & Li-ion abbreviations mixed up Link to comment Share on other sites More sharing options...
Smelly Posted November 16, 2012 Report Share Posted November 16, 2012 Yes that's true - in Japan I think. Apparently NiMh battery technology had been around for several decades before they perfected? the circuity to control them as they approached end of life. Was this the Dell laptop batteries? Link to comment Share on other sites More sharing options...
Gibbo Posted November 16, 2012 Report Share Posted November 16, 2012 Was this the Dell laptop batteries? They've all done it. Dell, Sony, Panasonic. Not a single large company didn't get hit by it. Nokia was the biggest with (literally) tens of millions recalled. (but I stress again, it was lithiums not NiMH). Link to comment Share on other sites More sharing options...
fudd Posted November 22, 2012 Author Report Share Posted November 22, 2012 Went to charge one of my other batteries and thought it had also packed up. I've binned the wrong one. Shi7 Link to comment Share on other sites More sharing options...
Gibbo Posted November 22, 2012 Report Share Posted November 22, 2012 Went to charge one of my other batteries and thought it had also packed up. I've binned the wrong one. Shi7 I shouldn't, but I can't help it... Link to comment Share on other sites More sharing options...
fudd Posted November 22, 2012 Author Report Share Posted November 22, 2012 I shouldn't, but I can't help it... I deserve it Link to comment Share on other sites More sharing options...
fudd Posted November 22, 2012 Author Report Share Posted November 22, 2012 I deserve it Anyway. Shouldn't you be working? That new model should be out soon. ? Link to comment Share on other sites More sharing options...
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