Product information:

Emergency Charger — When Silence Isn't an Option. AA-powered mobile charger for critical comms in blackout zones, survival retreats, and field kits. No solar, no grid — just raw emergency input. Lightweight, waterproof power box with USB output. Packable, repeatable, reliable. Charge essential lifelines before the collapse.

1. Input voltage: 2.0-4.2V
2. Output voltage: 5.0V
3. Output current: maximum 500MAH
4. Color: White
5. Use 2batteries, the most common being the 5th/AA battery, or the 5th rechargeable battery
7. Equipped with a built-in DC-DC boost circuit, it can be boosted to 5V using 2 batteries, with a conversion efficiency of about 88% and an output capacity of about 44% of the battery capacity (capacity/2 * 88%=44%, for example, the battery is 2350mAh and the output capacity is about 1000mAh). After the new battery is installed, it can meet the emergency charging requirements of a typical smartphone once.
6. Built in protection circuit, when the AA battery in the charger is depleted or the device's lithium battery is fully charged, the charger automatically disconnects and stops charging!
8. You can charge your iPod/iPhone/phone/MP3/MP4/PSP/GPS anytime and anywhere with just 4 No. 5 batteries (easily available, 1.5V alkaline batteries or 1.2V No. 5 rechargeable batteries).
9. Applicable model: As long as your machine can be charged on the USB of the computer. Basically, you can use this emergency charging device. The voltage/current output standard is consistent with the USB of the computer, 5V/500mA
10. External dimensions: length: 80mm, width: 33mm, thickness: 21mm

Packing list:

Power box * 1pc