4x18650 Battery Pack

thingiverse

I constructed a battery holder that accommodates four li-ion batteries of the 18650 type. You can connect the batteries in the following ways: two parallel, two serially, or all four in series. I used copper sheeting for the contact points. I fabricated this assembly specifically for my RC boat and linked it in 2P × 2S configuration, resulting in approximately eight volts. In addition, I incorporated four rectangular holes to accommodate an optional cover, which must be designed separately.