There are lots of battery pack manufacturers in US. Trying to choose any of these companies that you can patronize is similar to a scattergun approach. This is because most of them are not good enough when it comes to producing batteries that can stand the test of time. Such is the reason why you should make your choice carefully amongst the various battery pack manufacturers in US. https://www.lithiumbatterychina.com/blog/2022/04/18/top-10-custom-lithium-ion-automotive-battery-pack-manufacturers-in-usa/