Amazon.com: LP 9V Rechargeable Batteries with Charging Station - 2 Pack 800mah Long Lasting 9 Volt Lion Batteries - Compatible with Wireless Microphones, Flashlights, Guitar, Keyboard : Electronics
PALO 18650 Battery Charger USB Charging for 18650 26650 16340 14500 10440 18500 Li-lion Battery 3.7V Battery Charger
Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger [bq24074] : ID 4755 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Savanna 45A Battery Charger - Lion Energy
Fxlion Single-Channel V-Mount and BP Li-Ion Battery PL-Q80B B&H