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Tool Talk Discussion Forum

Re: For NI-MH fans only

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js305

05-25-2013 06:22:10
184.79.57.233



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My practical take on lithium ion batteries vs nimh vs nicad depends on the use of the devices. With nicads we all learned that occasional use ruins a battery in no time. The home user that uses a drill/driver really hard once every six months and keeps in in a drawer somewhere finds out his nicads are always dead when he needs them. It's almost as bad with nimh batteries. Both are made to use regularly and often. The memory effect is well known.

Lithium ion batteries are best known for long storage life, and for the most part, are at full power for the duration of the discharge cycle and recharging them doesn't take nearly as long.

I'll quit rambling, for the person who uses the device every day and needs big amp hour ratings, the nickel metal hydride batteries are really good. For the ones who use them occasionally, once a week or less, the lithium ion batteries will be a better choice in my opinion. I have several Panasonic drills, impact drivers, and even a circular saw for metal cutting, all with 14.4 volt lithium batteries that will stay up and ready to use for months at a time.

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Jon Hagen

05-26-2013 10:08:51
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 Re: For NI-MH fans only in reply to js305, 05-25-2013 06:22:10  
The self discharge of a Ni Cad or Ni MH battery used to be really awful. If you did not use them within 48 hrs of charging, they were 50% gone. New technology of those batteries has made that problem a lot better. The last Ni cads I had would retain a useful charge for 2-3 weeks. The last pack of Ni MH batteries guarntee they will retain 90% of full charge for a year. Much more cost effective and reliable for someone who does not use them constantly.

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