Source for less expensive Lithium cells (in the USA)

#1 sells various types of battery cells.
Some are NEW and some are USED.
Sometimes, you have to crack open an old laptop cell holder ( or other plastic enclosure) to get at the cells.

They are located in the USA, so you don’t have to order from China.

I think the prices are pretty reasonable. I have ordered from them several times, and I always got what I paid for.

Battery Hookup: Genuine Lithium Batteries for DIY Projects