Rechargable Batteries
11-12-2003, 02:37 PM
#12
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[QUOTE]Originally posted by Whitestock03
11-12-2003, 05:25 PM
#14
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[QUOTE]Originally posted by boiler
11-13-2003, 10:26 AM
#17
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Boiler has a point. My rechargeable PDA battery is "Lithium polymer." The rechargeable cell phone battery is lithium ion. The Rayovac AA charger has a setting switch with two positions: NiCad and NiMH.
I have now exhausted my complete store of battery knowledge. Back to work.
I have now exhausted my complete store of battery knowledge. Back to work.
11-13-2003, 04:10 PM
#18
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Rob,
In my (admittedly limited) experience, the difference between a 1.2V rechargeable and a 1.5V ordinary cell matters only if the device takes 1. I have seen small headset radios that take 1-AAA that won't work on a NiCad. I've never encountered a device that takes 2 or more that cares.
All this discussion about rechargeable batteries has created an overwhelming urge to rant about one of my personal pet peeves: built-in rechargeable batteries. You know the kind: you don't put batteries in it, you hook the whole thing up to a charger. Then, when one of the cells or the charger with the proprietary connector craps out, you have to throw the appliance away.
Give me replaceable, standard batteries. Then when my rechargeable cell dies, I can throw just it in the recycle bin at Home Depot.
Which launches a second rant: *please* dispose of used rechargeables responsibly. Cadmium (the "Cad" in "NiCad") is very toxic. Please don't send old NiCads to the landfill.
In my (admittedly limited) experience, the difference between a 1.2V rechargeable and a 1.5V ordinary cell matters only if the device takes 1. I have seen small headset radios that take 1-AAA that won't work on a NiCad. I've never encountered a device that takes 2 or more that cares.
All this discussion about rechargeable batteries has created an overwhelming urge to rant about one of my personal pet peeves: built-in rechargeable batteries. You know the kind: you don't put batteries in it, you hook the whole thing up to a charger. Then, when one of the cells or the charger with the proprietary connector craps out, you have to throw the appliance away.
Give me replaceable, standard batteries. Then when my rechargeable cell dies, I can throw just it in the recycle bin at Home Depot.
Which launches a second rant: *please* dispose of used rechargeables responsibly. Cadmium (the "Cad" in "NiCad") is very toxic. Please don't send old NiCads to the landfill.
11-13-2003, 04:39 PM
#19
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Originally posted by RedY2KS2k
Rob,
In my (admittedly limited) experience, the difference between a 1.2V rechargeable and a 1.5V ordinary cell matters only if the device takes 1. I have seen small headset radios that take 1-AAA that won't work on a NiCad. I've never encountered a device that takes 2 or more that cares.
All this discussion about rechargeable batteries has created an overwhelming urge to rant about one of my personal pet peeves: built-in rechargeable batteries. You know the kind: you don't put batteries in it, you hook the whole thing up to a charger. Then, when one of the cells or the charger with the proprietary connector craps out, you have to throw the appliance away.
Give me replaceable, standard batteries. Then when my rechargeable cell dies, I can throw just it in the recycle bin at Home Depot.
Which launches a second rant: *please* dispose of used rechargeables responsibly. Cadmium (the "Cad" in "NiCad") is very toxic. Please don't send old NiCads to the landfill.
Rob,
In my (admittedly limited) experience, the difference between a 1.2V rechargeable and a 1.5V ordinary cell matters only if the device takes 1. I have seen small headset radios that take 1-AAA that won't work on a NiCad. I've never encountered a device that takes 2 or more that cares.
All this discussion about rechargeable batteries has created an overwhelming urge to rant about one of my personal pet peeves: built-in rechargeable batteries. You know the kind: you don't put batteries in it, you hook the whole thing up to a charger. Then, when one of the cells or the charger with the proprietary connector craps out, you have to throw the appliance away.
Give me replaceable, standard batteries. Then when my rechargeable cell dies, I can throw just it in the recycle bin at Home Depot.
Which launches a second rant: *please* dispose of used rechargeables responsibly. Cadmium (the "Cad" in "NiCad") is very toxic. Please don't send old NiCads to the landfill.
Good advice about the landfills, Red. All batteries should be sent to recycling.
11-14-2003, 02:59 AM
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Having exhausted prior knowledge, I'll add new learning:
The charging mechanism for Li-Ion is different than NiCad's and NiMH. From Cell-Con.com:
"Lithium ion battery chargers utilize a constant current, constant voltage charge algorithm. Final termination for this charge process occurs when the charge current falls below a minimum current threshold.
Nickel metal hydride and nickel cadmium battery chargers utilize a constant current charge algorithm. Final termination for this charge process occurs when the negative delta voltage, or NDV, is achieved (note: peak voltage detection, or PVD, is available)."
For whatever reason, technical or economic, the major battery retailers do not appear to be marketing an AA Li-Ion charger or to market their AA Li-Ion batteries as rechargeable. Based on the above, it would appear to be a bad idea to attempt to recharge AA Li-Ion batteries in a conventional AA charger. The devices I am familiar with that use Li-Ion rechargeable batteries have built-in chargers.
Consumers Reports adds their 2c by categorizing Li-Ion AA's as single use and referring to NiMH as the most economic choice long term.
Enough.
The charging mechanism for Li-Ion is different than NiCad's and NiMH. From Cell-Con.com:
"Lithium ion battery chargers utilize a constant current, constant voltage charge algorithm. Final termination for this charge process occurs when the charge current falls below a minimum current threshold.
Nickel metal hydride and nickel cadmium battery chargers utilize a constant current charge algorithm. Final termination for this charge process occurs when the negative delta voltage, or NDV, is achieved (note: peak voltage detection, or PVD, is available)."
For whatever reason, technical or economic, the major battery retailers do not appear to be marketing an AA Li-Ion charger or to market their AA Li-Ion batteries as rechargeable. Based on the above, it would appear to be a bad idea to attempt to recharge AA Li-Ion batteries in a conventional AA charger. The devices I am familiar with that use Li-Ion rechargeable batteries have built-in chargers.
Consumers Reports adds their 2c by categorizing Li-Ion AA's as single use and referring to NiMH as the most economic choice long term.
Enough.
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