1S battery charger
thingiverse
This tiny charger can charge up to three LIPO batteries in parallel at once. The default charge current is one amp, but it can be reduced by replacing a resistor on the charger's circuit board. It relies on a phone charger with a minimum of 2.5 amps for all three ports to work simultaneously. Three TP4056 modules are used, which are widely available online for just one dollar each. JST-DS LOSI 2.0MM 2-Pin Connectors are also required. Note that the three square holes on top need to be filled with hot glue to function as light guides, directing LEDs' glow to the upper surface. For more R/C ideas, visit my blog at http://byoq.over-blog.com/.
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