Yes but to make battery swapping economical we need the D cell for car batteries and given the proliferation of laptop and camera batteries that seems unlikely. You can buy a rechargeable D cell at your local retail store that has a capacity of 2200maH just like the AA beside it - guess what - it's just a AA in sheep clothing. You can also get a D cell with 10,000maH capacity for several times the price and it weights considerably more.
So pick what you need they will both fit in the same flashlight or radio or toy robot or ... Lawrence Harris On Aug 28, 2014, at 9:01 AM, Ed Blackmond via EV <ev@lists.evdl.org> wrote: > > > On Aug 28, 2014, at 6:51 AM, Robert Bruninga via EV <ev@lists.evdl.org> wrote: > >>>> how much range is enough...is it better to... decrease price >>>> without improving range or make electric vehicles go further on a charge? >> >> > Why not do both? >> >> Amen. I like the new Nissan concept of a range of batteries to match the >> individual. >> >> I do not want to spend extra 10's of thousands of dollars for an extra 50 >> miles range that I only need 2% of the time. That makes that 2% travel very >> expensive. Back when TESLA offered three range batteries, the cost >> difference was something like an extra $50,000 to go from their smallest >> battery to the largest. That means if one generally uses the Tesla for >> local travel, then those once a month trips over 250 miles are costing an >> extra $50,000. For that money, one can rent a gas car EVERY weekend for 10 >> years including gas, and not have to lug around the extra 500 lbs of battery >> every day commuting. >> >> On the other hand, if one travels 200 miles often, then there is no >> question, the extra $50,000 gives you a great EV to make the trip. >> >> Bob, WB4APR >> > This also suggests a leasing model for the battery pack. The car can be > purchased or leased separately from the battery pack. Someone who needs a > long range can lease a battery pack with a guaranteed capacity of something > like 60KWH. When the pack capacity drops below this, it can be turned in for > one that has the guaranteed capacity. > > The first pack can then be leased for another car at a lower guaranteed > capacity (presumably for a lower fee). This process can be continued until > the pack is no longer useful for mobile applications. > > At this point, packs can be used for stationary applications like grid > stability, peak load shaving, and similar things. When they are no longer > useful for these applications, they can be taken out of service and recycled > into a new high capacity pack again. > > A driver who need a 25KWH pack most of the time, but on a special occasion, > needs a 60KWH pack, can simply have the pack swapped and pay the extra fee > for as long as the higher capacity is needed. For example, in colder > climates, a higher capacity pack might be needed for a few months of the > year. Someone taking a vacation might need a higher capacity pack for a > weekend or a few weeks. > > Ed > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA > (http://groups.yahoo.com/group/NEDRA) > _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
