Description
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.