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Weltool BB11 Extension Tube – Dual 21700 Battery Tube for F11R Flashlight

Name: Weltool BB11 Extension Tube – Dual 21700 Battery Tube for F11R Flashlight
Brand: Weltool
Availability: InStock

$16.00

Flashlights

In stock

First listed 5mo ago

Buy at Going Gear

About Weltool BB11 Extension Tube – Dual 21700 Battery Tube for F11R Flashlight

Weltool BB11 Extension Tube

The Weltool BB11 (F11R-ExtensionTube) is a flashlight accessory and dual-battery extension tube made for the Weltool F11R flashlight. Installing the BB11 lets the F11R run two 21700 rechargeable lithium-ion batteries (such as the Weltool INR21-60) for significantly longer runtime.

Highlights

Doubles battery capacity — run two 21700 lithium-ion batteries
Made for the Weltool F11R flashlight
Longer runtime for extended sessions in the field
Extension tube only — flashlight and batteries sold separately

Specifications

Model	Weltool BB11
Compatibility	Weltool F11R Flashlight
Battery Support	2 × 21700 lithium-ion (e.g. INR21-60), not included
Material	Aluminum alloy, anodized finish
Includes	Extension tube only

Frequently Asked Questions

What does the Weltool BB11 extension tube do?

The Weltool BB11 (F11R-ExtensionTube) lets the Weltool F11R flashlight use two 21700 lithium-ion batteries instead of one, increasing runtime.

Which flashlight is the Weltool BB11 compatible with?

The Weltool BB11 (F11R-ExtensionTube) is designed for the Weltool F11R flashlight.

What batteries does the Weltool BB11 use?

With the Weltool BB11 (F11R-ExtensionTube) installed, the F11R accepts two 21700 rechargeable lithium-ion batteries such as the Weltool INR21-60. Batteries are not included.

Does the Weltool BB11 include a flashlight or batteries?

No. The Weltool BB11 (F11R-ExtensionTube) is the extension tube only; the F11R flashlight and 21700 batteries are sold separately.

Why use a dual-battery extension tube?

The Weltool BB11 (F11R-ExtensionTube) roughly doubles available battery capacity, extending runtime for longer tasks without recharging.

Where can I buy the Weltool BB11?

You can buy the Weltool BB11 (F11R-ExtensionTube) at Going Gear. Going Gear is an authorized Weltool dealer.

Specifications

Battery: 21700
Features: Extension Tube

Specs derived from Weltool BB11 Extension Tube – Dual 21700 Battery Tube for F11R Flashlight listing data — verify critical details with the retailer.

Price history

At $16.00, it's priced below the median for Weltool's lineup ($56.00 median).

90-day low: $14.40
Lowest tracked: $14.40

Current price is 11% above the 90-day low.

Based on 2 recorded prices since May 2026.

Price Comparison by Material

Going Gear

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$16.00

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Frequently asked questions

How much does the Weltool BB11 Extension Tube – Dual 21700 Battery Tube for F11R Flashlight cost?

The Weltool BB11 Extension Tube – Dual 21700 Battery Tube for F11R Flashlight by Weltool is currently priced $16.00 and is in stock. Drop Beacon tracks live prices so you can find the best deal.

Is the Weltool BB11 Extension Tube – Dual 21700 Battery Tube for F11R Flashlight a good price right now?

At $16.00, it's priced below the median for Weltool's lineup ($56.00 median).

Where can I buy the Weltool BB11 Extension Tube – Dual 21700 Battery Tube for F11R Flashlight?

The Weltool BB11 Extension Tube – Dual 21700 Battery Tube for F11R Flashlight is available from 1 retailer tracked on Drop Beacon. Compare their live prices and pick the cheapest before it sells out.

What is the lowest price the Weltool BB11 Extension Tube – Dual 21700 Battery Tube for F11R Flashlight has been?

The lowest price Drop Beacon has tracked for the Weltool BB11 Extension Tube – Dual 21700 Battery Tube for F11R Flashlight is $14.40. Full price history shows whether the current price is a genuine deal.

Weltool

$16.00

Buy

Weltool BB11 Extension Tube

Highlights

Doubles battery capacity — run two 21700 lithium-ion batteries
Made for the Weltool F11R flashlight
Longer runtime for extended sessions in the field
Extension tube only — flashlight and batteries sold separately

Specifications

Model	Weltool BB11
Compatibility	Weltool F11R Flashlight
Battery Support	2 × 21700 lithium-ion (e.g. INR21-60), not included
Material	Aluminum alloy, anodized finish
Includes	Extension tube only

Frequently Asked Questions

What does the Weltool BB11 extension tube do?

The Weltool BB11 (F11R-ExtensionTube) lets the Weltool F11R flashlight use two 21700 lithium-ion batteries instead of one, increasing runtime.

Which flashlight is the Weltool BB11 compatible with?

The Weltool BB11 (F11R-ExtensionTube) is designed for the Weltool F11R flashlight.

What batteries does the Weltool BB11 use?

With the Weltool BB11 (F11R-ExtensionTube) installed, the F11R accepts two 21700 rechargeable lithium-ion batteries such as the Weltool INR21-60. Batteries are not included.

Does the Weltool BB11 include a flashlight or batteries?

No. The Weltool BB11 (F11R-ExtensionTube) is the extension tube only; the F11R flashlight and 21700 batteries are sold separately.

Why use a dual-battery extension tube?

The Weltool BB11 (F11R-ExtensionTube) roughly doubles available battery capacity, extending runtime for longer tasks without recharging.

Where can I buy the Weltool BB11?

You can buy the Weltool BB11 (F11R-ExtensionTube) at Going Gear. Going Gear is an authorized Weltool dealer.