New Drop-In Battery Aims to Boost EV Range

Daily Car

·

04/11/2025

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Electric vehicles lose range as their batteries wear out. Owners now face a single costly fix - swap the whole pack for a new one. That bill runs between fifteen and twenty-five thousand dollars. A Croatian firm, EV Clinic, has built a less expensive route for older EVs.

EV Clinic builds plus repairs electric cars. The team built a bolt in range-extender box stocked with fresh Samsung SDI prismatic cells. The first version slips into the lower trunk of a Tesla Model S and leaves most cargo space free.

The extender holds 17.1 kilowatt hours of usable energy but also adds about sixty two miles of range. It ships with its own battery management board, a cooling plate, a small coolant pump and a pyro fuse from the Tesla Model 3. If a fault occurs, the unit cuts itself out of the high voltage loop.

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Wiring the extender pack in parallel with the main battery lowers total internal resistance. At a DC fast charger the car holds peak current longer as well as shortens the session.

The Model S unit is ready - the company will adapt the design for the Volkswagen e-Golf, Nissan Leaf and multiple Smart EVs. No retail price is set, but EV Clinic states the part will cost far less than a full pack replacement. Owners gain extra range without scrapping their cars.

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