Yeah, being very soft on the pedal and really making use of gaining more speed downhill before an uphill to not have to throttle up a lot makes a huge difference. I've got my range up to 14.7 right now. I want to see if I can make it 15 by the end of April. It's touchy, you do some afternoon drives around here where you simply have to 'drive normal' and it drops but with enough early commutes it keeps going up for me.
some rechargable batteries gain power with break in. is this the case with pip, or do they start off at peak and slowly lose power?
I believe that there will soon be a plug and play battery that will add about 25 miles of range to the prius. It will be modular and removable. It would sit in the cargo area when that space is not needed and removed when the space is needed. It should be able to be charged with the factory charge cable or standard level 2 charger, and not need to be unplugged or charged separately. The charge time would of course be about double because total usable battery would be about double. An upgrade like this would make the prius a far better choice than the volt, from a gas mileage point of view.
One things for sure, if you want to get the best gas mileage possible, you (unfortunately) need to PO the drivers behind you. I try to be curtious when other drivers are around but I usually do not accelerate as rapidly as most people do.
i was thinking about this the other day (wishful thinking) but i'm wondering how feasable it would be to have a removable battery. i think safety is a primary concern and it could be difficult for toyota to create an area in the back that would be crash proof and yet you easily remove and install an extra battery, not to mention user error. it would have to be fool proof for people who can't tell the accellerator pedal from the brake.
Adding 25 miles for a prius would need to have about 6-7kw usable (2.7kw usable yields 11miles). Check out plugin supply's 4kw and 10kw options. Hope you have some serious weight-lifting background. 10kw usable pack is 300 pounds. If you are thinking there will be a variation of the 4kw pack (which is only 100lb for a 11/2.7*4 = 16 miles of EV mode, for a total of 27miles. A 4kw system is $5000 (though some stated give discounts0 and you'll still not have the range of a Volt. And it would still drive like a prius. If you only needed 25 miles on some days and 11 was good enough for others it might work, but with the added cost the only advantage would be for those that absolutely hate GM.