What store should i buy from? Looking for something 10-15ah 36v. LIfepo4 still the safe and reliable chemistry option?
Is ping still in business? Should i go lifepo4, 18650 or something else?
You can buy bulk individual cells in whatever format you wish, like 18650 if you so wish. The trust in the pack building could come from your own skillset, learned of course. Time and patience is on order, of course. But its easier knowing your cells are good because you bought them from a good place, then its all up to you and yours. DIY your own pack.
Personally, I'd skip the Lifepo4 idea, do your trypial Lio-ion pack, I'd say in 25R 18650.
Now, if you could find an EV battery like out of a Volt or Tesla or whatever EV battery module, set it around their voltage. I dont have a clue what voltages the segments come in but its worht looking into whether its local or on the net. I'm personally interested in a hybrid, even a car good on fuel is getting costly on fuel.
You could use tool batteries in your ebike operations. The various voltages, like ego is 54 or 60v or comething.
Come to think of it, yes the 35e is good to I just forget the discharge rate with those. It all depends what you want your discharge rate to be, how much you want to stress the discharge aspect. There are a lot of cheap tab welders out now, that you can hook up to a lipo for the high discharge required for the spark. I used an old microwave transformer and rewound the wire and bought a pcb board for the tab welder, it worked good. I can build another battery in the future, and the good part is you know exactly the quality and the trust factor of your battery because you would have bought 18650-25R from NKON or something.