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about $300/lb
Not if they are extended release (ER)
is 300 too high?
The price of lithium is approx. 2,5 US $/pound.
100%
At the current rate of $300/lb it would cost $66.14.
There are 1000 micrograms in a milligram. Therefore 0.3mg is 300 micrograms. 300 / 50 gives 6. You are correct.
300 feet was the highest
Lithium-ion Battery: If you are using a laptop with a Lithium-ion battery (most newer laptops), it should give you between 300-500 charge/discharge cycles. This type of battery doesn't like full discharges and should be avoided when-ever possible.
300 feet
my ashtray.
It is 300 m high