Pal Strap - GPS & Extended Battery Strap For Pebble

Created by Powerstrap

Pal Strap - GPS & Extended Battery Strap For Pebble
C9008436ba0f98fcda8c0656b15ebcbc original
1,446 backers pledged $124,161.00 on Kickstarter

Pal is a revolutionary GPS and battery extender smartstrap for Pebble Time, Pebble Time Steel and Pebble Time 2

Raised in Kickstarter
$124,161.00 / 1,446 backers
Raised in BackerKit
$5,141.00 / 55 backers
Estimated Shipping Date: December 2016
T2 bgrey sgrey legacy square thumb
Pal - For Pebble Time / Time Steel (Shipping July 2017)
Pal is designed for Pebble Time Time / Time Steel. Independent GPS and battery extender smart... more »

Learn About Our Project:

Every Pebble deserves a Pal.

Hello, my name is David, and I have a passion for making great watchstraps! Along with my engineering colleagues, I've worked very closely with Pebble to create the world’s first GPS and battery extender Smartstrap for the following Pebble watches: Pebble Time, Pebble Time Steel, Pebble Time Round (20mm), Pebble 2, and Pebble Time 2.






The world’s first GPS and battery extender Smartstrap for Pebble watches (Time / Time Steel / Time Round / Pebble 2/Time 2). It’s lightweight and durable -- sure to be a great companion to your Pebble! The strap’s GPS is independent so you don’t rely on a connection to a smartphone and it features an extended battery so that you don’t have to worry about your battery -- it provides true freedom while out on the trail.

It features a high performance, independent GPS that allows users to track speed, distance, elevation and route for up to 24 hours without the need for a Smartphone. Begin your activity as soon as you go out, no time wasted idly waiting for a signal. Pal uses industry leading GPS (Qualcomm SiRF), which provides quick signal pickup.

The Pal Smartstrap extends the life of Pebble Time, Pebble Time Steel, Pebble Time Round (20mm), Pebble 2, and Pebble Time 2 for up to seven days, serving as a backup battery so users spend less time worrying about their next charge. Also, the Pebble and strap share the same charger for hassle-free charging. In case of emergency, the Pal can be used as a battery back-up to the Pebble.

Pal’s companion app for iOS and Android offers instant access to GPS performance data, which can be shared with friends and family. Review the location log records from the GPS, and display the route and running information (e.g. pace, speed, lap time, altitude, etc.) on both Android and iOS. Users can even preset targets and measure performance against their goals. 

Sharing: Users can upload records to their preferred social platform (e.g Facebook or Twitter) through shortcut keys in app so they can share their progress.

I've been in the watch strap manufacturing business for years and have witnessed smartwatch makers treat watch straps as a secondary component. The straps that I saw were procured at the last minute and with little engineering effort put into the strap design. 

Pal started in 2014 with the question “Why don’t we make better use of straps for smartwatches?” I brought up the ideas to two other engineers - CC and Edwin, whose backgrounds are in electronics, mechanical engineering and the battery business. The three musketeers of Powerstrap put together a conceptual battery strap prototype and presented it to Pebble. They have been great partners in helping us identify what would be of most use to the Pebble community, best practices and gave feedback which helped us perfect the design.


 The reason we named our strap "Pal" is because it's a true and trusted companion to your Pebble!

Pal is comprised of a Qualcomm SiRF GPS module, a 250mAh Li-ion battery and a micro-controller unit that handles GPS data calculation, power management and active communication with Pebble. When Pal’s GPS is turned on, it consumes power only from its own battery and not Pebble’s battery.

Raw GPS data received from satellites are processed by Pal’s MCU and results are pumped to Pebble for display and storage. Through our efficient power management intelligence, Pal’s battery recharges Pebble’s battery only when the user manually activates the function or when Pebble’s battery drops to very low level and triggers auto-charging. 

Connecting pins between Pal and Pebbles are surrounded by soft gasket. This structure makes Pal water resistant but most likely cannot withstand prolonged submersion such as swimming or diving. In any case, even if water goes between connecting pins, Pal’s electronic design has protection measure and it won’t be damaged.

Technical Specs:
GNSS support: GPS only
TTFF cold fix time: about 40 seconds under open sky. Location fix time can be accelerated by AGPS (working in progress with Qualcomm)
Location hot fix: within 10 seconds

Certification: planned to be done upon campaign success and product launch: CE, FCC, IC

Battery technical Specs: Battery capacity: 250mAh Battery chemistry: Lithium Ion Polymer Nominal Voltage: 3.8V Pebble Watch’s battery: can be charged from either PAL’s internal battery or external charging port underneath PAL Internal battery of PAL: charge up from charging port underneath PAL

Pal (even when combined with the Pebble watch) is 20% lighter and more compact than the average GPS while still offering enhanced functionalities.



In order to do this, along with providing optimal durability, flexibility and weight without compromising looks we used TPU. This material also allows us to engineer an ergonomic strap curvature to ensure that it fits comfortably.



The material is a TPU material, which is carefully selected for the right durability and flexibility without compromising on looks. Also offers an ergonomically engineered strap curvature to ensure that it fits comfortably without compromising on looks.


Pal for Pebble Time and Pebble Time Steel and Pal-TR for Pebble Time Round Colors 

Pal-T2 for Pebble 2 and Pebble Time 2  Colors


Excluding our Kickstarter costs, our campaign goal of USD 80,000 covers mass production tooling, procuring minimum-order-quantity of electronic components, first lot production cost and upcoming testing certification cost.


We have been working very closely with Pebble to provide the best strap for the amazing Pebble community since 2014. We have been diligently working on this and just need the last funding to get production started. 


Since day one we have decided to make Pal an open platform GPS strap. Our object has always been making the GPS strap as useful to most Pebble users as possible. We have been helping Pebble to refine its API related to GPS functions. We are expecting developers to look into our API and develop new app with Pal. If you have ideas, don’t be shy. Contact us at

Developers that have already raised their hands and started looking into Pal 3rd party development:


Powerstrap was founded in 2014 by three engineers headed by David Yeung. The team has strong development backgrounds and passion for watches, electronics, mechanical design and batteries. Inspired by the growing applications of smart watches that were originated by Pebble, the Powerstrap team immediately took note that there were limitations in battery power with most smart watches. Together, they pledged to resolve this constraint by utilizing the watch strap and buckle to provide the extra battery life sorely missing. Their initial battery watch strap prototypes had impressed Pebble and thus led to collaboration in developing Pal - GPS & battery strap for Pebble. Powerstrap will continue to explore solutions that will equip smart watches with more power and functions.