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04-05-2007, 06:06 PM
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500+ Head-Fi'er
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Join Date: Jan 2006
Location: Pasadena, MD/Terre Haute, IN
Posts: 751
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charge time
How can I approximate the charge time for a battery? I have a 9.6V 270mAH battery being charged on a trickle charger from a 12V 1A wall wart. And if was to measure the current draw from an amp, what would have to do to predict full charge battery length? And btw, the amp is a M^3ed PINT.
__________________
Headphones: Ultrasone HFI-780, Beyerdynamic DT880, Shure SE530PTH, Sennheiser HD580, Altec Lansing iM716, Koss KSC 75
Amp: DIY M^3, DIY Mini^3
Sources: 5G iPod, Omega Striker II
Heatware
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Previously owned: SR-325i, iM716, E2C, DT-770, HD-555
FOR SALE! Beyer DT880
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04-05-2007, 11:38 PM
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100+ Head-Fi'er
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Join Date: Jan 2007
Posts: 473
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270mAh divided by the charging current being produced by the trickle charger.
That will give you a value of so many hours.
Example: If your trickle charger puts out 15mA of current then 270mAh/15mA = 18 hours.
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04-06-2007, 12:34 AM
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500+ Head-Fi'er
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Join Date: Jan 2006
Location: Pasadena, MD/Terre Haute, IN
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Ok, I see now. Looks like I need to swap out a resistor to get the proper current for the trickle charge. Thanks!
__________________
Headphones: Ultrasone HFI-780, Beyerdynamic DT880, Shure SE530PTH, Sennheiser HD580, Altec Lansing iM716, Koss KSC 75
Amp: DIY M^3, DIY Mini^3
Sources: 5G iPod, Omega Striker II
Heatware
Head-Fi Feedback
Previously owned: SR-325i, iM716, E2C, DT-770, HD-555
FOR SALE! Beyer DT880
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04-06-2007, 01:29 AM
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100+ Head-Fi'er
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Join Date: Jan 2007
Posts: 473
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Search http://www.tangentsoft.net in the PPA battery charger tweaks.
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