The Weltool BB11 extension tube is a practical and essential accessory designed specifically for the F11R flashlight, offering a significant enhancement in the flashlight's performance by increasing its battery capacity. When installed on the F11R, this extension tube allows the flashlight to accommodate two 21700 batteries (INR21-60), effectively doubling the battery life. This is particularly beneficial for users who require extended operation times in the field, such as during prolonged outdoor expeditions, professional use, or emergency situations where reliable and long-lasting power is crucial.

Crafted with the same precision and high-quality materials as the F11R flashlight, the BB11 extension tube seamlessly integrates with the flashlight, ensuring a secure and durable connection. The design maintains the ergonomic balance of the flashlight, providing a comfortable grip and ease of use even with the extended battery configuration. The tube’s robust construction ensures that it can withstand the rigors of regular use, while its lightweight design ensures that the flashlight remains portable and easy to handle.

By enabling the use of two 21700 batteries, the BB11 extension tube not only increases the runtime but also ensures that the F11R flashlight can deliver consistent performance over extended periods. This is particularly important in scenarios where recharging opportunities are limited, and users need to rely on their flashlight for long durations without interruption. Whether you are in the middle of a multi-day hiking trip, conducting nighttime operations, or simply want the peace of mind that comes with extended battery life, the BB11 extension tube provides a straightforward and effective solution.

It is important to note that this product listing includes only the extension tube, without batteries or other accessories. This allows users who already own compatible 21700 batteries to easily upgrade their F11R flashlight’s capabilities without unnecessary additional purchases. The installation process is simple and requires no special tools, allowing users to quickly and efficiently increase their flashlight's battery capacity.

In summary, the Weltool BB11 extension tube for the F11R flashlight is a highly functional accessory that significantly enhances the flashlight's utility by increasing its battery life. It is a valuable addition for anyone who needs their F11R flashlight to perform for extended periods, providing both reliability and convenience in one well-designed package. Whether you are a professional who depends on your flashlight in demanding environments or an outdoor enthusiast who values long-lasting gear, the BB11 extension tube is a must-have accessory that ensures your F11R flashlight is ready to go the distance.

This link is just an extension tube

SHIPPING
The final shipping cost and estimated delivery timeframe will be available to you during checkout. Currently, we offer 3 International shipping methods which are steady and easy to track. Priority worldwide shipping, Premium ( Partial countries) and a faster Express shipping. The estimated times stated below are not guaranteed. An international package could experience delays like postal strikes or severe weather or Cov-19 situation. All shipping ways, PO Box address is not acceptable.

For some flashlights, there's a pure battery inside（phone charging）,If We can not ship your packages via USPS or DHL,we'll ship your package in another way.

If you don’t receive your order within the estimated time frame provided below and suspect that it might be lost in transit, please contact Flashlightgo Support ( support@flashlightgo.com ) and we can look into the order with the courier. Lost-in-transit requests must be submitted to Flashlightgo Support within 3 months of the date of shipping or before the courier archives the tracking information.

Option 1.
Express by DHL/UPS/Fedex/Aramax/SF etc ( there may be tax need to pay in this way),
The estimated time of delivery is usually 3-7 work days depending on the country. Includes detailed tracking and confirmation of delivery.

Option 2.
Premium ( 6-10days, All tax and Duty Paid),
All tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

Option 3.
Priority shipping(1-2 Weeks, average 10 days)
If we marked it is with all tax and duty paid, all tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

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To ensure that you get the desirable product, we allow a seven-day product return period. Any product return application outside this period will not be entertained.
All returned product must be unused and the original package should be kept.

Return：
We do not offer return for personal products like socks and hats or food, magazine and fragile or dangerous products The original receipt must be available for application of return.

Discount products：
No product return for discount products

Gifts products：
If the item is marked as a gift when purchased and shipped directly to you, it cannot be exchanged , refunded or warranty.

Exchange：
We only replace items if they are defective or damaged.
Exchange service are offered only to wrong deliveries or product damage not caused by client. If needed, please email to info@flashlightgo.com.

Warranty
How long is the warranty period?
Flashlightgo warrants to the original purchaser that the Product(s) shall be free of any defect in material or workmanship for a period of one year for labor and one year for parts from the date of the original order except the items listed below:
Chargers,Batteries and Other Accessories: 3 months warranty

Should the Product(s) supplied by Flashlightgo prove defective because of improper workmanship or material as reasonably determined by us, Flashlightgo agrees, at its option, to either repair or replace the Product free of charge, excluding any shipping or handling charges.

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