$37.99 – FNIRSI HRM-10 Battery Voltage Internal Resistance Tester (Banggood, Aliexpress: FNIRSI HRM-10 Battery Voltage Internal Resistance Tester 18650 High-precision AC Acid Lithium Lead Car Battery Capacitor Tester – Blue (the best price with coupon)).
When I was updating this page, then coupon price was $37.99 for FNIRSI HRM-10 Battery Voltage Internal Resistance Tester (in Banggood). Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
Latest coupon code price check (UTC time):
Banggood ($37.99)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Price? From what I can see this price is higher than average price ($36.87).
Link: Banggood product page
Price: $37.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
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:
1. (6.2.2025, $34.99): BGf6b7d8
Item: FNIRSI HRM-10 Battery Voltage Internal Resistance Tester
Countries: CzechRepublic, Germany, Greece, Hungary, Poland, Slovakia(SlovakRepublic), Slovenia
Old coupons (from the oldest to the newest): BG8ad11e, BGEEUMEGA23, BG5cc0c7
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
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
Check out price history chart (for all/most countries) for FNIRSI HRM-10 Battery Voltage Internal Resistance Tester. The lowest price was: $33.
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)).