This LED bulb has Three build-in battery. It can be used as emergency light just by making current circuit such as taking the bulb head by thumb and middle finger and touch the bulb top by index finger.

Features:
Build-in recognize circuit, support emergency light for 5 hours.
LED provides high light and saves more energy.
Apply to home illumination and outdoor activity illumination.
Portable, very convenient to carry.
Specification:
Color temperature: 6500K
Power: 30W
Input voltage: AC 85-265V
Battery capacity: 3600MA(1200MA*3)
Charging time: 4-6H
Charging method: Connect to the E27 Lamp holder,Connect household electricity to charge
Lighting time for emergency: About 4-6H
Material: BPT
Product size:88*88*160mm
Package included:
1 x LED Bulb 
1 X Hook