Need urgent calculation!!
Need urgent calculation!!
(OP)
Hi there,
My manager requires a 5 watt device connected to a 12 V battery until it dies out. I would like to know how much the 5 watt device can run on the 12 v battery?
Alternatively will using NiCAD hi performance 7200 amp battery for radio control cars make substantial endurance better ?
Thanks.
My manager requires a 5 watt device connected to a 12 V battery until it dies out. I would like to know how much the 5 watt device can run on the 12 v battery?
Alternatively will using NiCAD hi performance 7200 amp battery for radio control cars make substantial endurance better ?
Thanks.





RE: Need urgent calculation!!
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If we learn from our mistakes I'm getting a great education!
RE: Need urgent calculation!!
If your old battery was a usual primary 1200 mAh battery for 10 h discharge for 2 h discharge the capacity will decrease to 80% as ScottyUK said. So 1200*.8=960 mAh will be the new capacity of the old battery.
Roughly the full charged battery of 1200 mAh will die in 2.3 h.
Now, the new battery of 7200 mAh capacity will die approx. in 7200/417=17 h -since the full capacity will remain the same for more than 10 h discharge time...
RE: Need urgent calculation!!
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RE: Need urgent calculation!!
RE: Need urgent calculation!!
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies