One Button USB Rechargeable Headlamp with Red Light
These USB Rechargeable headlamps are extremely well made with an almost zero failure rate. Best of all, they are Light and Bright and are completely waterproof.
They have 3 settings: high (138 lumens/5 hrs), medium (10 hrs), and low (15 hrs), a solid Red Light setting (press twice quickly) and a flashing Red Light setting (press and hold for 2s). These single button headlamps also remember what setting you prefer (if you've used it for 5s or longer). Then they become one-button-on and one-button-off headlamps! They don't get any simpler.
I've tested the headlamp to run 33 hours on low; it slowly dims so it doesn't suddenly leave you in the dark.
It weighs 59g. The headband is strong, durable, fully adjustable and very comfortable.
The built-in 1200mAh lithium battery will last for 500 cycles and is easily recharged with the included micro-USB cable.
You can also customize it by adding a name (up to 11 letters) for an extra $5.