AnswerID: 237616 Submitted: Thursday, May 03, 2007 at 09:52
Robin
replied:
Hi Greg
There is confusion in the terms and no universally accepted definition and marketing has run with it.
Thats the main problem - and then the term smart charger is added to makes things harder.
In other circles you see better definitions based on use of terms like IUI or IUOI
these are more internationly accepted.
Perhaps we could have a thread that better defines this in say an exploroz context.
Most of non basic chargers are 3 stage.
The stages are
1/ constant current initially (voltage rising )
2/ Constant voltage (main charge )
3/ Step down to a holding voltage.
There are further variations to the above -
The term smart or perhaps in your case "true" 3 stage tends to apply
when the charger senses in the first or other stages that there has been a drop in current and changes its voltage
(in some units initial voltage for constant current is lower)
Really smart units have overiding time switches and temperature measurement elements.
Note - Before we get into a definition war - the above is not a full definition - just a simplistic overview to give the idea
If Derek or someone could point us to the full Durst document then we could see more clearly the stages it uses.
Robin Miller
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