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there are other companies offering Lithium-Iron based powersports batteries, all except Shorai use cylindrical cells originally made for power tool applications.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) made for powersports. Shorai LFX batteries do not contain any 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 they are environmentally friendly. On average Shorai ultra light batteries are one fifth the weight of lead-acid batteries.