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post #1 of 13 (permalink) Old 06-05-2010, 08:03 AM Thread Starter
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Default No more overcharged batteries

A common cause of premature battery failure is over-charging. Many tools come with a charger claimed to be "automatic", either switching off when full charge is reached or going into low current trickle charge mode. Over many years I've had such chargers which failed to go into either of these states and have found the batteries too hot to hold.
My granddaughter's husband, being a caring type and knowing of my past problems has bought me a count-down timer, max. time 4 hours, so such problems should now be a thing of the past. Incidently, I've never come across these timers before.
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post #2 of 13 (permalink) Old 06-05-2010, 09:14 AM
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I take it that the timer cuts the power at selected times? Couldn't tell from the picture, but it wouldn't be much good if it just "ding dinged", now would it?.
the wife has a few like that but they are built in to various appliances. And I have one, also built in, on my dental silver shaker. It only goes for 2 minutes, though.
Great idea! You have a neat grandson-in-law.

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post #3 of 13 (permalink) Old 06-05-2010, 10:04 AM
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Sounds like a great idea, Harry.

I only have 2 Ryobi 14.4?Volt cordless drills which I use on a regular basis.

I fear that I don't charge them enough as I only plug the charger in when actually using the drills, wait for the one in the drill to lose power and then swap them over. (Don't have power to the shed)

This would be good to give them a good charge every now and then.

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post #4 of 13 (permalink) Old 06-05-2010, 11:31 AM
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I have two drills both 18 volt (B&D and Skill) and keep one battery charging at all times for each drill. The Skill is 5 years old and the B&D is 4 years old. I have not noticed any change in their performance as yet. They do remain a little warm like a florescent light tube.

In a past life when I served in Canadian submarines that were diesel electric. It was customary to do an equalizer every so often, this brought each cell (we had 880 cells) to their top performance.

To my understanding each cell whether dry cell or wet cell should have an equalizer every so often, mine get done continuously. I also run my batteries down every so often rather than change after 1/2 or 3/4 using them to have a fresh battery.

I am sure I am breaking some golden rule about charging, but this seems to work for me. I look at my portable phone, my cell, any recharging item I have in my house is charging when not in use.

To my understanding when a battery is fully charged it reaches a point of what is called a trickle charge, it just excites it but not really charging it.

As I understand charging!

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post #5 of 13 (permalink) Old 06-05-2010, 08:28 PM
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John.

"(we had 880 cells)"

I'll bet they weren't D cells either.

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post #6 of 13 (permalink) Old 06-05-2010, 08:55 PM
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post #7 of 13 (permalink) Old 06-05-2010, 09:10 PM
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Hi James, no to D cell,,, each cell was about 1 meter high and 35 millimeter square, (3ft high X 12in square) and each cell was 1 volt but the amperage was really high (I don't remember the amperage). Them puppies were large. There were 2 compartments of 440 each and each battery compartment supplied 440 volts.

Them O class boats are a thing of the past, they were beautiful when we picked them up in England in 1965,,,, Brand new

That was where I learned what little I know about charging.

Have a great day

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post #8 of 13 (permalink) Old 06-06-2010, 07:05 AM Thread Starter
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Thanks for the model number James. Yes, it's a count down timer that switches off the power at the pre-set time. It isn't the battery that goes into trickle mode, it's the charger, and most if not all cheap cordless tools don't have this feature and so keep charging and dramatically reduce the life of the battery. Even the auto. charges can go faulty and overcharge the battery, which is why this timer is the perfect answer.

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post #9 of 13 (permalink) Old 06-06-2010, 07:12 AM Thread Starter
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Quote:
Originally Posted by Check twice! View Post
Hi James, no to D cell,,, each cell was about 1 meter high and 35 millimeter square, (3ft high X 12in square) and each cell was 1 volt but the amperage was really high (I don't remember the amperage). Them puppies were large. There were 2 compartments of 440 each and each battery compartment supplied 440 volts.

Them O class boats are a thing of the past, they were beautiful when we picked them up in England in 1965,,,, Brand new

That was where I learned what little I know about charging.

Have a great day
I've never heard of one volt cells John, I would suspect that they were Lead acid cells of two volts, split into two parallel banks to double the current (amps) and each bank in series to double to voltage, ending up with 440 volts.

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post #10 of 13 (permalink) Old 06-06-2010, 07:28 AM
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Hi Harry

I am glad the count down timer is working for you and saving money and the problem of overcharging your batteries has disappeared. I guess it is like all things in life,,, do what works for you.

I never was one for accepting the obvious, I like to challenge the obvious, I always believe there is more than one way to accomplish a task. Yup

I just wish they would put that on the package when buying a product, we would then have a better understanding of what each manufacturer recommends.

Great to see the timer working for you. Yes sir!

Have a great day Harry!

John

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