> BTW one other postential (although futuristic) alternative is > lithium-ion polymer, which has better energy density than the > li-ion (circular) and is much less volatile. Here is an > example of lithium polymer cells that have an energy density > of 130 Wh/kg! NP-F960s (Lithium Ion batteries) hold 38.8 watt-hours of energy and weigh 300 grams. 38.8 divided by 3 and multiplied by 10 equals 129.33333 Wh/kg. (And that is the specific energy, not the energy density, BTW. Energy density would be watt-hours per unit of area. Similarly with specific power and power density.) > Lead Acid 30 Wh/kg > Ni-Cad 40-60 Wh/kg > NiMH 60-80 Wh/kg > Li-Ion 90-100 Wh/kg > Li-Poly 130-150 Wh/kg -Chris -- Subscription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" toWear-Hard Mailing List Archive (searchable): http://wearables.blu.org please, Please, *PLEASE* don't subscribe through a forward/false domain
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