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Old 03-30-2007, 04:39 PM   #1 (permalink)
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Default Did USB Charging Kill the Battery of my 8700c?

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I forgot and left my 8700c connected via USB cable to my (always on) office computer for three weeks, while on a business trip.

Returned today, uplugged it and it would not boot up. Removed the battery, installed my spare and the 8700c operates perfectly.

Did I kill the battery by overcharging via the USB connnection to the computer? Or is there a possibility that it will "recover" after sitting out for some time?

I look forward to hearing your thoughts on this.

Thanks.
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Old 03-30-2007, 04:57 PM   #2 (permalink)
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Are you still able to return the battery under warranty?
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Old 03-30-2007, 05:06 PM   #3 (permalink)
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It shouldn't have killed it. Might be a defective battery.
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Old 03-30-2007, 05:42 PM   #4 (permalink)
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I just used the "tech chat" online feature offered by Cingular. The rep said that leaving the BB connected via USB to you computer for any amount of time is OK.

Interestingly, he said that when using the wall charger, you should unplug it after 5 hours. This is info they have from RIM, anything more than that will reduce the overall battery life.

In addition, he did say that its very common for people to leave their BB's connected to the wall charger overnight and that it does not seem to present a problem. I found it refreshing that they are candid and do not seem to be prone to place blame on the customer.

In my case a replacement battery is being sent at no charge to me under warranty.

Cheers....
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Old 03-31-2007, 01:56 AM   #5 (permalink)
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I'm not sure I follow. They say the wall charger should be unplugged after 5 hours or it will reduce the overall battery life. But then they say that people leave their BB's connected to the wall charger over night and it doesn't present a problem. Either people are sleeping less than 5 hours or I totally misread the statement!
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Old 03-31-2007, 03:39 PM   #6 (permalink)
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Quote:
Originally Posted by nimocone
I'm not sure I follow. They say the wall charger should be unplugged after 5 hours or it will reduce the overall battery life. But then they say that people leave their BB's connected to the wall charger over night and it doesn't present a problem. Either people are sleeping less than 5 hours or I totally misread the statement!
You are correct, in reading the post. It's contradictory, but I'm simply passing on their comments. However that was yesterday.

This morning I recieved a message back from RIM, stating that the 7130 & 8700 models have on board overcharge protection and will not charge after the battery has reached 100%.

Cheers.......
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Old 04-01-2007, 01:32 AM   #7 (permalink)
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I guess I'll assume the 8800 has it as well since it's so new. Thanks for looking into it and reporting back. Makes me feel more comfortable.
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Old 04-01-2007, 12:32 PM   #8 (permalink)
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Most Lithium Ion batteries have the "overchage protection" built into the battery itself.
I think this is another example of worthless customer support in the data area.
Usually, once you get past the carriers to Blackberry support itself, you can actually get help
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Old 04-03-2007, 04:59 AM   #9 (permalink)
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Quote:
Originally Posted by nimocone
I guess I'll assume the 8800 has it as well since it's so new. Thanks for looking into it and reporting back. Makes me feel more comfortable.
Yes, I forgot to say that it covers the four models I own, in my signature below.
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