$38.99 – JUNCTEK Battery Monitor Bluetooth KL-140F DC 0-120V 0-400A Battery Tester (Banggood, Aliexpress: JUNCTEK Battery Monitor Bluetooth KL-F DC 0-120V 0-600A Battery Tester Voltage Current VA Meter Battery Coulomb Meter Capacity Indicator – KL-140F (the best price with coupon)).
ATM you can buy JUNCTEK Battery Monitor Bluetooth KL-140F DC 0-120V 0-400A Battery Tester for $38.99 (in Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest price update (UTC time):
Banggood ($38.99)
Banggood warehouse is located in China. There are no coupons for this product in Banggood. The question is – is it a good price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $38.49)
Link: Banggood product page
Price: $38.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for JUNCTEK Battery Monitor Bluetooth KL-140F DC 0-120V 0-400A Battery Tester is here. The lowest price was: $37.99.
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)).