PHEV Toyota Prius Add-on battery system

We are from Shanghai China. We developed a conversion kit(add-on battery system) for Toyota Prius 2010-2013 version. The kit is all-in-one box made byour company. It is a 4kWh extension packs, giving the Prius up to 25 extra miles all-electric. The kit includes two battery packs, a charger, a dc dc converter, a BMS(battery management system) and a BSM(battery system monitor). The kit fits directly into the trunk of the Prius, over the top of the spare tire, and take up no extra trunk volume, fitting in a "dead zone" of space between the spare and the trunk floor. The requires no rewiring of the car, no changes to its software, and is merely an additional battery bank for the vehicle, enhancing the Prius' built-in battery system. You can convert your car by yourself with the guide of our manuals and video. The price is 3800USD. We afford the sea freight to your basic port. We do OEM for you if you need large quantity. Contact me at [email protected] or skype me at : ericdong1976