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???
11/18/09 11:53
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 		 #170930 - There's a clue there!
Responding to: ???'s previous message
Richard Erlacher said:
I find that if you leave the flashlight turned on and go away, returning after the battery is discharged, you might as well toss out the battery

The trouble with series-connected batteries - just as in any "chain" - is that there will always be a weakest cell that will be discharged first. If you leave the pack on-load beyond that point, that cell is effectively being reverse-charged - which will kill it very quickly!

To get optimum life from a battery pack needs careful control of both charging and discharge. Ideally, there would be a cut-off to avoid damage due to over-discharge - but many (most?) consumer devices skimp on this.

because it can no longer be recharged after being totally discharged, even once, and even with a brand-new battery.

It is a bit surprising that it can be that bad after just one episode!!

List of 29 messages in thread
TopicAuthorDate
Battery pack sockets            01/01/70 00:00      
   What about cellphone batteries? Old-style?            01/01/70 00:00      
      one more thing ...            01/01/70 00:00      
         Need more power (ahhh! ahhh! ahhh!)            01/01/70 00:00      
            parts again            01/01/70 00:00      
            Why not a standard gel-cell?            01/01/70 00:00      
               gel cells            01/01/70 00:00      
   if a one off            01/01/70 00:00      
      Parts list            01/01/70 00:00      
         here            01/01/70 00:00      
   The Problem?            01/01/70 00:00      
      Exactly. They're all proprietary            01/01/70 00:00      
         Reuse a charger?            01/01/70 00:00      
         2nd thoughts            01/01/70 00:00      
   another one            01/01/70 00:00      
   Thanks Everyone            01/01/70 00:00      
      Hitachi at Lowes, Ryobi at home depot            01/01/70 00:00      
         I've got a number of these ... Beware!            01/01/70 00:00      
            one other thing ...            01/01/70 00:00      
               There's a clue there!            01/01/70 00:00      
                  Binned battery cells            01/01/70 00:00      
               addendum ... more grist for the mill ...            01/01/70 00:00      
                  What's the model number            01/01/70 00:00      
                     Charger Model Number P113            01/01/70 00:00      
            no batteries!            01/01/70 00:00      
               In my opinion ...            01/01/70 00:00      
                  use your battery powered stuff for the occasional few...            01/01/70 00:00      
                     that's why ...            01/01/70 00:00      
                  It's much safer.            01/01/70 00:00      

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