There are several models of 133. The G133 is the most common 48V 12Ah lead acid battery. There is also type 133S, which is a lead acid battery with a larger capacity of 20 Ah. 48v20ah lithium battery, and the price is the highest at 4000pcs< /p>
18650 lithium battery is 3.7V 3AH. Use 40 batteries and connect each 10 in series to become 37V3AH per group. Then these 4 groups are connected. in parallel to become 37V 12AH This is very inconvenient. 40 batteries are required for welding and if there is a problem with an individual battery it will affect the overall performance.