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Battery Charger/Discharger

Old 09-25-2007, 11:40 PM
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Don41
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Default Battery Charger/Discharger

Way back in the mid 80s I used a battery charger that first discharged the battery then automatically cycled to charge. Is it advisable to use one of these (if they still exist) with todays' equipment?
Old 09-25-2007, 11:45 PM
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bobferguson
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Default RE: Battery Charger/Discharger

You don't cycle lithium batteries as it is not needed and can damage the pack if discharged to low.

ORIGINAL: Don41

Way back in the mid 80s I used a battery charger that first discharged the battery then automatically cycled to charge. Is it advisable to use one of these (if they still exist) with todays' equipment?
Old 09-26-2007, 10:35 AM
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Don41
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Default RE: Battery Charger/Discharger

Thanks for the info Bob
Old 09-26-2007, 11:18 AM
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Zeeb
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Default RE: Battery Charger/Discharger

While it is true that you don't cycle Lithium batteries of any chemistry, some or most actually, balancing chargers for Lithiums do so by drawing down the high cells first...

Don41,

You need to decide on what batteries you're going to run?

NiCD's (Nickel Cadmium) are probably what you were using? They are still made and any good charger will cycle them. If you pay attention to what features are offered, some will draw the battery down and then recharge it automatically, others will require that you watch them and make the change. The other really common chemistry in use today is NiMH (Nickel Metal Hydride). They had problems with the original types since they could not provide sufficient current output, thus the warning on some servos not to use NiMH batteries. These types of these batteries are now built to handle what can be high discharge rates from today's high performance servos if you watch what you're doing with selection. You have to watch for what you buy these days as you will run across NiMH with really high impedence or internal resistance that make higher discharge rates not sustainable.

You need to do some research on the battery question and decide on what you want to run and then worry about a charger. By the time you figure out what you want to know about batteries, you'll probably know what you want for a charger as well...

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