If you have purchased the charger, the size of DC will be sent to: 5.5 * 2.1 by default.
For other requirements, please contact customer service for customization.
Product description:
Nominal capacity: 4000mAh
Product size: 19*37*66mm
Voltage: 3.7 V
recommended charge current:2A
Standard weight: about 90g
The battery pack is widely used in headlights, miner's lamp, flashlight, searchlight, loudspeaker (loudspeaker), wireless monitoring equipment, medical equipment, instrumentation, traffic signs, portable small appliances
USB charger included