4P 18650 charger adapter

thingiverse

Here is a 4P 18650 cell battery charger holder I just created for my brother. With this he will be able charge all 4 batteries for his dive lamp at once. (As a charger, he will use an intelligent RC-battery charger.) WARNING: Before putting the batteries in place and connecting them all in parallel (!), you must make sure that their voltages are the same with 100mV accuracy. In case of my brother this is easy: The 4 batteries are in parallel also in the lamp, hence they discharge to the very same voltage. What you need - 4 pcs 1042P 18650 1-cell holder (https://fi.farnell.com/keystone/1042p/battery-holder-18650-smd/dp/2674338) - 4 pcs M4x6mm screws - 2-wire cable (select the thickness based on the max charge current) - 4 rubber cushions to the bottom corners - desired connector such as 2 pcs of banana connectors (red/black)