milwaukee flashlight battery charger LRYXYY 48-59-2012 USB and Portable Power Source, 4V Output, 2.1A Charge Rate, Compatible with REDLITHIUM USB Batteries and Mobile Devices, LED Fuel Gauge, 0.37lbs : Tools & Home Improvement Voltage Charger accepts all Cut:Mid-Full Cut F23M Specialized Echelon II Mips

milwaukee flashlight battery charger LRYXYY 48-59-2012 USB and Portable Power Source, 4V Output, 2.1A Charge Rate, Compatible with REDLITHIUM USB Batteries and Mobile Devices, LED Fuel Gauge, 0.37lbs : Tools & Home Improvement Voltage Charger accepts all Cut:Mid-Full Cut F23M Specialized Echelon II Mips

Specialized Echelon II Mips Helmet - Bike

But I found these were able to give good heel hold, even with a looser fit toward the toe end of the foot/boot

F23M

Cut:Mid-Full Cut

You may prefer something light to pack just a few in-flight essentials or you might want something more heavy duty

Voltage Charger accepts all M18 and M12 batteries