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Electric skateboard
An electric skateboard is typically a modified skateboard propelled by an electric motor, the power of which is usually controlled with an RF remote. As with a regular skateboard, it is steered by the rider shifting his or her weight. It was originally designed for local transport, but with the advent of more serious "Off Road" models is emerging as a new thrill sport. The Off Road style boards are able to traverse grass, gravel, dirt and hard sand and are often seen at low tide on the beach.
==Battery and range==
The typical range for an 800-watt unit with a LiFePO4 battery is between 16 and 20 km (9–12 miles). 600 W units achieve 20% less range than their 800 W counterparts, and units using the older sealed lead acid batteries achieve 30% less range than those using the LiFePO4 batteries. The maximum speed of a typical electric skateboard is about .
Many manufacturers now offer 12 Ah LiFePO4 packs as an optional upgrade over the more standard SLA battery packs, which reduces the weight of the boards by 10 kg (LiFePO4 packs weigh in at 5 kg compared to the 15 kg of the standard SLA pack). This results in a lighter, more agile board. Additionally, discharge chemistry of a LiFePO4 battery allows the motor to run at top speed constantly until the battery is exhausted, compared to the initial high current from an SLA battery which quickly tapers off as it discharges. Furthermore, a high quality 12 Ah-rated LiFePO4 pack can realistically deliver 9–10 Ah, compared to a 12 Ah-rated SLA pack which realistically delivers 7–8 Ah due to the high energy demands of an electric skateboard's motor (typically 25–35 amps when riding at high speed, over rough or sloping terrain).〔(【引用サイトリンク】title=Battery Discharge Stats )〕
By increasing the battery capacity to 20 Ah (using small-factor LiFePO4 pouch cells), ranges of 30 kilometers or more can be achieved even when riding at constant high speed.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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