Arduino misconceptions 6: a 9V battery is a good power source
Huge test of 33 9V batteries - YouTube
Batteries and Battery packs
Energizer 522BP-2 9 Volt Alkaline Battery Pack of 2: 9 Volt Batteries (039800036780-1)
When a rechargeable 9V battery dies, what is its behavior? Does it maintain 9V until poof, its 0. What does its curve time look like? - Quora
high performance 9v 650mah usb charging| Alibaba.com
Discharge tests and capacity measurement of 9 volt transistor radio batteries at high current, 100mA to 500mA engineering data
Energy Density of 9V battery vs. AA batteries - Bald Engineer
Discharge tests and capacity measurement of 9 volt transistor radio batteries at high current, 100mA to 500mA engineering data
Amazon.com: MGGZXR 9v Lithium Battery Rechargeable 1000 mAh, 2/Pack,9 Volt USB Rechargeable Batteries 10 Years Over 2500 Cycles for Smoke Detector Fire Alarm,Metal Detector,Multi-Meter,Garage Keypad,Ride Toys : Health & Household
SAFESEED Hi-Watt HW 9V Battery, Capacity: 600 Mah, Voltage: 9W, For DJ Products, Battery Type: Lithium-Ion