18650 to 21700 Battery Adapter, Converter Adapter for 21700 Flashlight Cases with Metal Contacts 18650 Sleeve Batteries Protective 21700 Battery Adaptor Holder Accessories (1 Battery Converter)

Name: 18650 to 21700 Battery Adapter, Converter Adapter for 21700 Flashlight Cases with Metal Contacts 18650 Sleeve Batteries Protective 21700 Battery
Brand: Weisi
Price: 15101.00 XOF
Availability: InStock
Rating: 2.4 (5 reviews)

Product ID: 518585014

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Details

Brand
WEISI
Connectivity Technology
Proprietary
Connector Type
MagSafe
Compatible Devices
Flashlights or
Included Components
18650 to 21700
Color
Black

⚡Copper-plated gold contacts for max conductivity

🔋Seamless 18650 to 21700 conversion

🛡️Fire-retardant ABS shell

Description

🔌 Power up smarter — adapt, save, and shine brighter!

PREMIUM SAFETY BUILD - Crafted with fire-retardant ABS and gold-plated contacts for reliable, safe power delivery.
LIGHTWEIGHT COMPACT - At just 0.25 oz, it’s the perfect portable power adapter for on-the-go pros.
UNIVERSAL BATTERY UPGRADE - Transform your 18650 batteries to fit 21700 flashlight cases effortlessly.
CONFIDENCE BACKED WARRANTY - Enjoy peace of mind with a 5-year warranty and dedicated customer support.
ECO SMART COST EFFICIENT - Save money and reduce waste by reusing your existing 18650 batteries.

The DIVTEK 18650 to 21700 Battery Adapter is a sleek, durable converter that lets you use your existing 18650 batteries in 21700 flashlight cases. Made from fire-retardant ABS with copper-plated gold contacts, it ensures safe, efficient power transfer. Lightweight and compact, this adapter offers a cost-effective, eco-friendly solution backed by a 5-year warranty.

Specifications

Manufacturer	DIVTEK
Part Number	Flashlight Accessories
Item Weight	0.634 ounces
Product Dimensions	0.85 x 0.85 x 2.7 inches
Item model number	1 Battery Converter
Size	1 Battery Converter
Color	Black
Style	Simple
Material	Acrylonitrile Butadiene Styrene
Shape	tube
Power Source	no
Included Components	18650 to 21700 Battery Adapter
Batteries Included?	No
Batteries Required?	No

Reviews

C**S

you need this

i needed this

4.04.2024

S**G

Flexibility to use 18650 in 21700

I was only 18650 batteries for years but recently added some 21700 flashlights to my collection. These devices are an easy way to use my 18650 as emergency backup power for the 21700 devices and save me the need to double up on every 21700 purchase. So far so good I have 2.

20.03.2025

M**.

Does not fit an 18650 battery.

Save your money, this thing does not fit an 18650 battery in either length or width. Mine is in the trash can now. The purchase price isn't worth the hassle of trying to send it back for a refund. I'd give this zero stars if it was possible.

16.08.2025

L**6

Does not fit.

Do not waste your time and money on this product. It does not make an 18650 long enough to span the contacts for something that requires a 21700. First image is an 18650 in the adapter, the second is an actual 21700.

28.05.2024

I**B

Arrived broken

Item arrived broken, probably due the poor quality of the item and also poor packaging.

26.07.2023