Batteries.

[RETIRED]

Pinched off another BB. Interesting article on Cordless batteries.

http://www.sawcenter.com/shopnews.htm

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Ian () Robertson
"We do good turns every day"

[Rod Smith]

Thanks , interesting article. I have read info on this before but this one seems to make the most sense. I have been guilty of some poor practices. Also I bought 2 bosch 7.2v drills, one with a 3 hour charger and one with a 1 hour charger and use the 1 hour for both, I was told they were the same except for the chargers and did this to save money. Mmmm, better have another look. See ya. Hope you have a good weekend to re-charge your batteries.

[John Saxton]

No doubt about it ,you're a charged up character.DEFINITELY a good post though.
Cheers

[JackoH]

This is probably a bit outside of the woodworking parameters of the topic, but it does pertain to batteries.
I recently purchased a video camera with a lithium ion battery, and the instructions for use state that the battery should "always be left in a discharged state and charged immediately before use" also "avoid storing a fully charged battery and do not leave it on the camera when not in use. One of the sales points of the deal was that it came with a spare battery. I ask you what is the point of having two batteries, both flat, when that once in a lifetime chance to film a prize winning entry for "Funniest Home Videos" arises.
John H

[Iain]

The post refers to NiCad not Lithium which is a different product and displays different discharge parameters.
Your reference to storage I think you would find relates to extended storage times, although the instructions can be somewhat nebulous at times.
I use NiHydride in my camera, which is different again and the same points are noted, I tend to ignore them and in four years have not had any problems.
Leaving batteries in a camera will discharge them sooner as there is always a current drain even though it switched off. The switching in these circuits is usually electronic and not mechanical thus the continual discharge but only a few milliamps, enough to discharge a battery over a period of time. With NiCad and NiHydride even if a battery is continued to discahrge when flat it can go into reverse polarity and this is when you strike major problems. The engineers idea of flat and the laymans idea of flat are totally different. If a rechargable does not have the power to operate a device it is more than likely that it has insufficient voltage and is not in a totally discharged state.