WindRunner™ self-balancing electric vehicle user’s manual95 The properties of a battery may vary gradually with frequent use. So the battery indication may beinaccurate after a period of time. To ensure high safety, the battery capacity of WindRunner has a redundantsafety margin. When the battery indication has only one division, the WindRunner begins its Speed limit and shakealarm. The battery is actually 10%~30% left. For safety reasons, also keep an eye out for battery discharge. Ifyou do all of these things, the life cycle of the battery may be prolonged.B.2 Tire and land form The tire pattern and land form have an adaptability and compatibility relationship. Moreover, theperformances of the tire used for suitable or unsuitable land forms vary greatly. The tire of the WindRunner G1U urban type is suitable for common urban road conditions such as asphaltroad, cement road, glazed tile and brick road, rigid leveled earthy roads, etc. Under these service conditions, G1Uurban type may award the best riding experiences, and optimum tire adherence effect, and optimum batterystamina. But the all terrain type is lower efficiency on urban road, so the battery stamina is relatively lower, andthe tire may be worn more rapidly. The pattern of tire for the WindRunner G1U all terrain type is applicable for grassland, earthy slope, forestland, and muddy/rugged mountainous road. On these road situations, G1X all terrain type may reach its optimumshock-absorbing effect, and optimum tire adherence effect. Although G1U urban type may be also rode on somerugged and uneven road with difficulty, its tires will have poor adherence, lower safety and shock-absorbing effectthan that of all terrain type tire. So more caution should be considered when riding.