The most cost effective ones are not exactly on the market.
You order the parts and the needed tools/devices from the land of the free mail order businesses, and then you follow some youtube tutorial for instructions how to build your battery. Saves you thousands.
The most cost effective ones are not exactly on the market.
You order the parts and the needed tools/devices from the land of the free mail order businesses, and then you follow some youtube tutorial for instructions how to build your battery. Saves you thousands.
It is a good way to have a fire hazard at home, if you don’t know what you’re doing.