|Forum topic by nopcbs||posted 12-03-2011 07:16 PM||10284 views||0 times favorited||4 replies|
12-03-2011 07:16 PM
I bought two 16V Sears Craftsman Professional Li-Ion drills a couple of years back at different times. One was the 320.29036 with a 320.29006 battery pack and the other was a 320.10320 with a 320.11208 battery pack. Also got a 320.10321 Universal charger.
My habit was to keep one battery in the charger at all times.
After a couple of years of very light use (I mostly use my DEWALT 18V drills), I went to use one of the drills and found that the battery was totally dead. No problem, I go to the charger, take the charged battery and swap it for the dead one. Drill does not work! Hmm. So I pop the charged battery into the other drill…nothing. I notice that the status lights on the charger are not lit with either battery in place. Like it does not know a battery is even present. I put the other battery back in the charger. No signs of charging. Very disconcerting.
Dead charger? I buy another one at Sears and try it, same thing. It’s the batteries! I look at the labels, notice the same build date 08/2007.
I am seriously PO’d at Sears at this point that these batteries would go dead after very light use and with one in their smart charger all the time.
I discover a friend at work has the 20V Sears Li-Ion drill set and, I ask him to check my batteries and charger with his stuff. He has the sloped front charger…like the one I had bought to see if mine was bad. He puts the 320.11208 battery on his charger first and noted a popping noise when he first did this…and the battery charges! It charges right up. (And will now charge in my charger and runs my drills fine.)
Then he tried the 320.29006 battery pack and that one will not charge. He also tried putting his 20V battery back on the charger and then putting on my 320.29006, but no luck. He returns the batteries and my charger to me.
We speculate about what the heck is going on. Best speculation is that his charger remembered that it had last been used with a 20V battery when he put my first 16V battery on and it had to switch back to 16V after sensing that my battery is a 16V…hence the “pop”. So the 16V battery got a momentary over-voltage which “shocked” it back into working. Not sure why this did not work with the 320.29006.
Anyway, I am pretty much convinced that I am the victim of not-so-smart circuitry in the batteries and/or the chargers that is preventing that other battery from being recognized as being present by my charger. I don’t even get the dead battery light on the charger. I don’t think the charger recognizes that a battery is present. I do not know why the battery that was already on the charger when I first went to do a swap was dead. Again, I suspect that the charger’s logic about whether a battery is present and in need of charging is at fault.
Any thoughts…especially solutions?