How to get in your McLaren when the battery is dead, and how to wake up the battery. - YouTube
McLaren has a battery upgrade for the P1 hypercar
Kid Motorz Mclaren P1 '0405 6V 7Ah Ride-On Toy Replacement Battery: BatteryClerk.com Ride-On Toy
Mclaren Battery Charger — Miller Motorcars Boutique
Amazon.com: MIEBELY Remote Control Car, McLaren Rc Cars Officially Licensed 1/12 Scale 7.4V 900mAh Toy Car with 12km/h Fast Model Car Headlight for Adults Kids Boys Age 6-12 Year Birthday Ideas Gift