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COAST ZX20B Booster Pack for RL20R

ZX20B Product Overview

Extend your runtime of your RL20R without plugging in. The ZX20B booster battery enables you to recharge the built-in ZITHION battery in your RL20R without going back to the wall. The booster battery simply slides and snaps into place over the top of the built-in battery and begins charging it, increasing the headlamps total runtime.

Part No: ZX20B(BBB-ZX20B)

ZX20B Technical Specifications

  • Power Source: Built in rechargeable Battery
  • Lumens (High): 200 Lumens
  • Lumens (Low): 78 Lumnes
  • Beam Distance (High): 17m
  • Beam Distance (Low): 10m
  • Run Time (High): 3 Hours 30 Mins
  • Run Time (Low): 10 Hours

COAST ZX20B Booster Pack for RL20R


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ZX20B Key Features

  • The booster also features a rear-facing, independently controlled red safety signal that shines in two modessolid and flashingto ensure you are visible from behind.
  • When turned off, the safety signal doubles as a reflector.
  • For added versatility, the ZX20B is outfitted with a chip on board (C.O.B.) mini flashlight that shines 200 lumens with a 10 hour run time plus an integrated pocket clip so that whether you need more power or a second light, you are good to go.
  • Recharge the booster battery via USB-C and monitor progress of the fast charge system using the charge level indicator.
  • Once powered up, the USB-C port on the ZX20B can also be used as a power bank for other devices.
Delivery & Returns
Delivery & Returns
We offer free delivery on orders over £55, placed before 4pm Monday to Thursday. Note that next day delivery for orders placed after 4pm on Thursday, up to 4pm Friday, is usually Monday (excluding bank holidays). Estimated delivery for all orders placed over a weekend is Tuesday. Note that due to the size and weight of some products, next working day delivery is not available and additional carriage charges will apply. If you would like to return your goods, we will offer a full refund or exchange within 30 days of purchase. For full details, visit our delivery and returns page. Ts&Cs apply.
All of our products come with a standard 1 year manufacturers warranty, however if you would like to discuss extending this warranty, please contact our customer service team on 03330 043777, or email For further warranty information from this specific manufacturer, visit our warranty page.