Loginphp said:
I have a lot to learn about quality batteries and I am going to focus on that more now. What type of batteries do you suggest? You said Samsung cells. Also where would I buy these batteries? I can probably search it on my own if I know the type of batteries I'm looking for. The ones I have are VISET from Amazon but I hear a lot about Samsung cells. My bike would hit 32mph max with me on it, now it barely hits 27/28 with what I THINK is a lot more sag. I vaguely remember the sag before I noticed my performance dropping. I suspect the batteries.
Edit: Is there any requirements off the bat if I were to upgrade my batteries to a higher amp?
Just guessing, but looking a the description, I'd guess your packs are made with generic Chinese cells, probably 2500mAh capacity. That would be 13S4P for each pack, for $186 each, if this is the correct listing:
https://www.amazon.com/VISET-Warehouse-Electric-Bicycle-Bicycles/dp/B0895J9SNF/ref=sr_1_3?dchild=1&keywords=viset%2B48v%2Blithium%2Bion&qid=1633999081&sr=8-3&th=1
Comparing that with a 13S4P pack using Samsung 35E cells from EM3EV (reputable pack maker based on reading this forum), which are 3500mAh cells, with a 13.6Ah pack capacity (most places would call this a 14Ah pack, 3.5x4, but EM3EV rates their pack conservatively). The EM3EV pack is $429. 36% more capacity, but 2.3 times the cost.
https://em3ev.com/shop/em3ev-48v-13s4p-super-shark-ebike-battery/
Just guessing, but I bet their single 13S5P jumbo pack (17.5Ah, $509) will outperform your paralleled generic packs, at not much more than the cost of your two packs. https://em3ev.com/shop/em3ev-48v-13s5p-jumbo-shark-ebike-battery/