MiniUSB 3.7v Li-Ion Battery Charge Board Enclosure
by biketool, published
Box and lid for miniUSB/5v to 4.1 volt smart charging board designed for safely charging 3.7v Li-ion batteries. Has one hole for the miniUSB port and another for the cable and a stress relief. One lid has holes to view the charging and charge complete LEDs, the other is solid. I now use this to field charge a tactical light which is used on my bicycle helmet after dark to help find camp.
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OpenSCAD files included to allow tweaking to fit your board and stress relief cable boot and LED window placement. I never got the LED windows exactly right as I was measuring a 90% scale print and didnt want to waste more filament so I used the Lid1 which is also attached. I think I printed everything at 110% to give extra room to seat the board and fit the stress relief boot, I would probably leave both tops open and make a bit of the lid come down to close the port and cable boot in if I were to need a better box. The board is listed as 5V Mini USB 1A Lithium Battery Charging Board Charger Module and has a silkscreened part number of RD084DY002 it is 2cmx2.5cm and ~1cm tall. These regulator boards are cheap on ebay and can be used to charge most phone batteries if you have a charge base.