Question about Sony Handycam DCR-HC40 Mini DV Digital Camcorder
Recently I bought a SONY DCR-HC40 camcorder, the SONY BC-TRP charger and an extra SONY NP-FP70 lithium ion battery pack (quick charge battery). I charged the battery that came with the camcorder (NP-FP50) in the SONY BC-TRP charger and, by mistake left the battery in the plugged in charger overnight. 1) Is it possible to overcharge a lithium ion battery by leaving it in the plugged in charger overnight, as I did? 2) According to the instructions for the charger, I can leave the battery in the charger for an hour after the charge light goes out (indicating a full charge) and the battery will charge even more. Are there any disadvantages in doing that? Thanks. Richard
Posted by Anonymous on
Here's a small FAQ I found: 1) My lithium ion battery is the SONY NP-FP70 Battery Pack. Does the fact that the battery is called a battery pack mean that it has built in circuitry to prevent an overcharge? No. I write with some authority since I've dissected too many and there is no such circuit in the battery. From a system perspective it doesn't belong there. 2) Is there any way of knowing if my SONY BC-TRP charger has the circuitry for preventing an overcharge? You'll have to ask, but the key clues are: a. The documention tells you to not leave it plugged in overnight. b. The battery gets too hot and melts the plastic. 3) If I charge my battery in my camcorder (SONY DCR-HC40), can I assume it has the built in circuitry to prevent an overcharge? a. One can't assume anything. b. But from what I read on that model, you plug it in and forget about it. To do that, it would have a proper charge circuit.
Posted on Sep 13, 2005
Yes. But a proper charger will not do that.
Posted on Sep 13, 2005
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