Will both give the same range on a 36v 500w bike kit? I can get 3 x12v 10ah seal lead for 15$ each free ship they weigh 3kgs each so its about 19 lbs for the whole pack. the lifepo4 costs 300$ for it on ebay and who knows if its even reliable at all? Btw if your lighter can it give you a longer range I weigh 145 lbs so I thought maybe that would help.