How can i buy extra cosoos batteries the same ones that came with my flashlight \? Do they sell just the batteries?

Dear Customer, Thanks for your question. The same rechargeable battery is just out of stock. Could you contact us at service@cosoos.com and we will let you know when it is available? All our COSOOS products come with 1 year warranty.(Battery chargers come with 3 year warranty) If you meet with any product problem,please contact us by service@cosoos.com and we will send you a new one at once. Best regards, COSOOS Sales Team service@cosoos.com

what are the measurements of the battery?

Dear Customer, The rechargeable battery’s diameter is18mm and length is 65mm. Our flashlight also support aaa battery and aaa battery is not included. All our COSOOS products come with 1 year warranty, so please do not worry about quality. We also sell soundbar with subwoofer, colorful led strip lights(app & remote control), magnetic wireless charger for iphone 12, disco ball light, rechargeable battery charger, BYD Digital Infrared Forehead Thermometer with FDA & CE certificate... If you need, contact us at service@cosoos.com and we will send you the link. Btw, since the virus is still severe around the world, please do not forget to wear a medical mask to protect yourself before going out. Be safe as well wherever you are! Hope to hear from you. Best regards, COSOOS Sales Team service@cosoos.com

Special Feature	4cm Ruler & Pupil Gage, Adjustable Light Modes, With Pen Clip, Non Slip Grip, USB-C Rechargeable, Durable, Lightweight, Portable
Power Source	USB-C Rechargeable
Light Source Type	LED
Material	Stainless Steel
Included Components	2 Short 29.5cm/11.6in USB-A to USB-C Cables, 2 Rechargeable Pen Lights
Product Dimensions	5.31"D x 0.51"W x 0.51"H
Battery Cell Composition	Lithium Polymer
Item Weight	0.61 Ounces
Number of Batteries	1 Lithium Polymer batteries required. (included)
Water Resistance Level	Water Resistant
Brand	COSOOS
Brightness	100 Lumen
Battery Description	Lithium-Ion
Style	Flashlight for paramedic, pediatrician, pediatrics, resident,emergency technician,med school
Recommended Uses For Product	Reading, Indoor, Camping
Manufacturer	COSOOS
Size	Pen Flashlight
Part Number	Chargeable Pen Lights
Item Weight	0.61 ounces
Country of Origin	China
Item model number	2 pack penlights
Batteries	1 Lithium Polymer batteries required. (included)
Item Package Quantity	2
Shape	Pen
Specific Uses	Flashlight for paramedic, nurses, doctors, pediatrician, pediatrics, resident, emergency medical technician or med school nursing students.
Special Features	4cm Ruler & Pupil Gage, Adjustable Light Modes, With Pen Clip, Non Slip Grip, USB-C Rechargeable, Durable, Lightweight, Portable
Light Direction	Adjustable
Batteries Included?	Yes
Batteries Required?	Yes
Bulb Features	2-way switching, Needs recycling, Shock and vibration resistant

COSOOS 2 Rechargeable Pen Lights with Pupil Gauge & Ruler, Mini LED Penlights for Nurses Doctor, Warm/White Light with Clip, USB-C Rechargeable Penlight Flashlight Gift for Nursing Student

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