You can create price alert here, copy coupons and view price history. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Battery Pack 3.7V, Battery capacity 4000mAh, Charging USB, Type Foot Warmer, Material 80% cotton / 12% polyester and 8% stretch fiber, Size M/L ; XL/2XL, 3 Heating settings Low/medium/high temperature, Color Dark Grey, Sport/Activity Winter Sports
Banggood
Banggood warehouse is located in Europe . One coupon is available. Cool!
Link: Banggood product page
1. ($46.99): BG589b2e
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): BGff9918, BG47ae96, BGc08fcd, BGbeae75
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Unisex Heated Socks 3.7V 4000mAh [EU].
Price records source(s): Banggood
Click on image to enlarge.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).