While there are other companies offering Lithium-Iron based powersports batteries, all except Shorai use cylindrical cells originally made for power tool applications. Shorai LFX batteries contain Shorai-proprietary eXtreme-Rate Lithium Iron prismatic cells (chemistry LiFePO4). Shorai LFX batteries do not contain poisonous lead, dangerous acid, and do not create explosive gasses during charge, as traditional Lead-Acid batteries do. Compared to a lead-acid, Shorai LFX lithium are also extremely light, have a much lower self-discharge rate, do not sulfate (i.e. do not degrade while sitting unattended), and are environmentally friendly. On average Shorai ultra light batteries are one fifth the weight of lead-acid batteries.