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For decades, electric wheelchairs have been known to be heavy, bulky, and very difficult to transport - until recently when lightweight, portable power wheelchairs started dominating the market. What explains this market disruption? 1. Lithium Battery. This is the key behind making all devices portable, whether it's your mobile phone, laptop or electric wheelchair. The lithium battery was invented only in 1980, less than 3 decades ago. Prior to this, sealed lead acid batteries were the primary energy storage for motorized wheelchairs, and they weigh easily 10 times more than lithium batteries. And in order to hold the weight, wheelchair frames needed...

If you're a frequent traveller, you may be aware of that whether or not a lithium battery can be brought on board depends on its Watt-Hour (WH) rating. But what exactly is WH, and where do you get this information? The best place to look would be on the battery itself. Sometimes, the WH rating is stated quite clearly, like in the picture above. But much of the time, it is not stated. The way to calculate this is to use the voltage of the battery, and multiply it by the capacity. Voltage is denominated in Volts (V), while capacity...