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???
11/18/09 13:02
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 		 #170932 - Binned battery cells
Responding to: ???'s previous message
Andy Neil said:
It is a bit surprising that it can be that bad after just one episode!!

My guess is that the individual battery cells are not binned, so they have a big variance between the cells resulting in polarity reversal.

A bettery manufacturer should bin the cells so that they at least initially have similar capacity. Then you will not be until the cells have aged that they will start to diverge.

I have many times driven new battery packs to extremely low energy contents while testing charger behaviour. For example 0.14V for a 6-cell 9Ah NiMH battery pack - just over 20mV/cell. They normally recover fine when new.


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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