If you feel the need to protect the future of your family by purchasing gold or silver coins, then you need to buy coins that are not valued by numismatics. You need to buy coins that are valued by weight and recognizable standard value.
That said before you buy the batteries it is better to know what kind of battery is suited for the equipment that you have. Generally all the manufactures include this advice on the equipment itself. CR2032 sodium ion batter are also such batteries which are used in a lot of equipments. The other most common type of batteries is the alkaline batteries and the nickel cadmium batteries.
Most battery packs are of the Nickel-Cadmium (Ni-Cd) type. These offer reasonably long cobalt mining copyright life and will take hundreds of re-charge cycles. As far as re-charging goes, I recommend giving a short shock burst into the air every month or so. Make sure the spark is as loud and strong as when you first tried it after your first full charge. If not, re-charge.
Then again, any American who sees a business going into China might consider that business to be a pioneer of sorts. That's particularly since so many people think that China is still in the third world.
A lithium drill is much lighter than a comparable drill of the same voltage. This allows you to use higher voltage tools with lighter weight. Remember, voltage equals power, mah equals the gas tank of the battery. So, if you are using a 12 volt now, a 18 volt or even a 36 volt lithium mines ontario drill will offer you much more power and still have the same run time of you 12 volt with close to the same weight.
The "heart fainted" investor will preferably need to focus on gold. If you are not afraid of volatility and you have an iron stomach, then you could go for silver. You'll have potentially higher profits. But be sure to time your purchase.
The BMW i3 concept features a purely horizontal configuration, but the i8 concept abandons this arrangement. Instead, the i8 LifeDrive architecture features vertical layering. Keep in mind that the i8 is still a concept until its release in late 2013.