The customer contacted us to repair his Electrolux ZB3104 vacuum cleaner.
After consulting with the customer, we selected cells with a slightly higher capacity from the old LG HB3 (1,500 mAh) to the new Sony VTC4 (2,000 mAh).

For connections between cells we used few pcs 0.2mm pure nickel strip.

If you have some questions, you can use comments under video or you can contact us on our facebook   / matejcells