GitHub - sparkfun/Photon_Battery_Shield: Battery Shield for the Spark Photon. Has a charging circuit, as well as a fuel gauge.
![SparkFun Sunny Buddy - MPPT Solar Charger (MPPT) Solar Charger for Single-Cell LiPo Batteries LT3652 Power Tracking 2A Battery Charging Circuit: Amazon.com: Industrial & Scientific SparkFun Sunny Buddy - MPPT Solar Charger (MPPT) Solar Charger for Single-Cell LiPo Batteries LT3652 Power Tracking 2A Battery Charging Circuit: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/81JfGXMtPeL.jpg)
SparkFun Sunny Buddy - MPPT Solar Charger (MPPT) Solar Charger for Single-Cell LiPo Batteries LT3652 Power Tracking 2A Battery Charging Circuit: Amazon.com: Industrial & Scientific
![lithium ion - How can the SparkFun Lipo USB charger power other devices at the same time as charging? - Electrical Engineering Stack Exchange lithium ion - How can the SparkFun Lipo USB charger power other devices at the same time as charging? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/o9Hmv.jpg)