Amazon.com: 3.7V Battery Charge Module, Solar Charge Controller Module LiPo Li-ion Lithium Battery Charger MPPT Solar Charge Module for Solar Battery Charging(with Needle) : Patio, Lawn & Garden
Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger [bq24074] : ID 4755 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: 3.7V Battery Charge Module, Solar Charge Controller Module LiPo Li-ion Lithium Battery Charger MPPT Solar Charge Module for Solar Battery Charging(with Needle) : Patio, Lawn & Garden
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