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MiniUSB 3.7v Li-Ion Battery Charge Board Enclosure

by biketool, published

MiniUSB 3.7v Li-Ion Battery Charge Board Enclosure by biketool Dec 7, 2012
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Summary

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.

Instructions

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.

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So, how do you draw current from the RD084DY002? Does the USB port output current or is that just for charging the battery.

This board has a miniUSB input for power and regulates charging on Li-ion batteries. In my case the output is an older 3mm nokia charger tip from an old phone charger, I added a stress relief at the box.

See this also for a similar charger and enclosure http://www.thingiverse.com/thing:60110http://www.thingiverse.com/thi...

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