So then what's the difference between them?
The problem with making my own pack is that I have no idea what I am doing and I have no idea how to keep the batterys in place or even connect them. And i wouldn't have any overcharge protection or any way to charge them (unless i build all this myself; which even I don't trust myself doing)here is what i run.
https://www.maxamps.com <------- Li-po
https://www.18650batterystore.com/18650-p/samsung-20s.htm <------ Li-ion
https://www.18650batterystore.com/Protected-p/panasonic-18650-protected.htm <----- Li-ion ( protected )
i have a lote cars trucks drones boats e scooters to fuel and im sick of china trash battery packs that dont live up to expectations I refuse to buy them and will never recommend them to anyone I've had Chinese battery packs puff catch on fire and I even had one explode in my RC boat while I was out on the water not to mention Chinese batteries never hold the capacity that they claim they do they're usually about half but that's typical Chinese trash manufacturing they lie about everything you can't even buy a car amplifier from a Chinese manufacturer without them lying about how many watts it puts out
Unfortunately pre-made battery packs there's no telling what the cells are and if they're good quality or not there's also no telling if they use the proper gauge wiring or terminal connectors to handle the amp loads that they're claiming as well and if it's Chinese it's probably made of the lowest quality knock off crap they can possibly get I know for a fact that the old rule of you get what you pay for is very very true in battery packs....
China is also one of the few countries that manufactures stuff for export only for the reason there stuff is made so poorly that they don't even want it in their country