I own this one, its been great!

Amazon, free shipping, total cost $10.99

AMIR Digital Kitchen Scale, 3000g 0.01oz/ 0.1g Pocket Cooking Scale, Mini Food Scale, Pro Electronic Jewelry Scale with Back-Lit LCD Display, Tare & PCS Functions, Stainless Steel, Batteries Included

https://www.amazon.com/AMIR-Electronic-Functions-Stainless-Batteries/dp/B01DGEWHN4/ref=sr_1_36?s=home-garden&ie=UTF8&qid=1520881968&sr=1-36&keywords=kitchen+scale

I just had a chance to reweigh it and it’s still reading 20.8oz for me

This is the scale I’m using

We all use AMIR kitchen scale here:

https://www.amazon.com/AMIR-Electronic-Functions-Stainless-Batteries/dp/B01DGEWHN4/

It is for weighing the pieces of your gear and not the entire thing altogether. If you have any individual piece of kit that is more than 2.5 kg, then you can probably find a lighter replacement that is under 2.5 kg.

Get a luggage scale to weigh your entire pack and its contents.

I use this AMIR scale I picked up off Amazon for $11. It has 0.1 gram accuracy and I check it with a calibration weight one a week. It still works perfect a year later.