ATM you can buy 8-70V LCD for 12.64 USD (in Banggood). Basically copy coupon, view price history or create e-mail price alert. What is best price?
Latest coupon and price update (UTC):
Banggood (12.64 USD)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Is it a low price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal 5.04 USD)
Link: Banggood product page
Price: 12.64 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 00c906, BG00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, BGJUNEGSG9, Cuponation9, 9OFFSUMMER, BG589b2e
(there’s a little possibility that old coupon will work)
Aliexpress
Click here… to search for 12V/24V/36V/48V 8-70V LCD Battery Capacity Indicator on Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for 12V/24V/36V/48V 8-70V LCD Battery Capacity Indicator is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).