So I am back to my first love, LiFeP04!
18650's are all fine and dandy, but I realized after promising my trusty ole' a123 16s 1p (52v 20ah) pack to a friend, that it was STILL ALIVE AND STRONG going on 10 - 15 yrs old!!!
I had already promised the pack, so not going to go back on that promise, but I do Uber Eats and Postmates deliveries on the Ebike now, and I really regret that after testing the pack for a week to make sure it was still worth something, and lo and behold, it is the BEST DAMN battery pack I have used yet!!!
I go up and down long steep hills for 50 miles on an average delivery day in Oregon City, and West Linn (7 - 14% grade hills are common here) and this pack has never even dropped below 52V nominal while at rest, and never sagged under power more than down to 49V with a HEAVY Recumbent Cargo Bike (about 80lbs+ loaded with food for several deliveries)!!!
I have TONS of space on my cargo 'bent, so weight and size are really non-issues, I would love something along the lines of a 16s 2p (52V 40 AH) a123 Prismatic pack, but I don't believe they are really available anymore, but I have heard good things from my friends over in Cebu City, Philippines about some high quality packs that are "new old stock" or some such, so they are a little cosmetically warn, but otherwise new, and though they are a123 clones, they perform very well!
I want a pack that can handle a 40a constant, 60a burst load, as I will be shooting for 20 MPH no pedaling up steep hills using my BBSHD with Luda controller (first I am going with hot-rod "1000w" settings, and if that doesn't perform as I hope, I have the Luda to swap in) I need most of all range, speed is secondary, as long as I can have good acceleration, and maintain 20 MPH up hill, I am satisfied! Any and all suggestions welcome!
P.S. I am also on the search for a pack that has a built in DC to DC converter so I can charge up my smart phone and run a light or two VIA USB, tired of trying to rig up my own DC to DC, they never seem to last more than a year or 2.