Kept this in my glove box and finally had a reason to use it when my phone was nearly dead during a long drive. Two AA batteries and I was back in business. Exactly what I wanted for emergencies.

Bought one for my emergency kit. The fact that it uses regular AA batteries is the biggest selling point for me.

Small enough to keep in my travel bag without taking up much room. I like having a backup that doesn't depend on being charged beforehand.