$4.29 – Good: 1.5V ~ 1.3V| 9V ~ 7.8V., Low Power: 1.3V ~ 1.15V| 7.8V ~ 6.3V, Replace: Below 1.15V| Below 6.3V., Low Power: 1.3V ~ 1.15V| 7.8V ~ 6.3V, Dimensions: 110x60x25mm/4.3″x2.4″x1.0″, Good: 1.5V ~ 1.3V| 9V ~ 7.8V., Replace: Below 1.15V| Below 6.3V., Dimensions: 110x60x25mm/4.3″x2.4″x1.0″, Battery Size: 1.5V | 9V., Battery Size: 1.5V | 9V..
According to my DB the lowest price is $4.29 for DANIU BT-168D AA/AAA/C/D/9V/1.5V Battery Tester (in Banggood). Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Latest price update (UTC time):
Banggood ($4.29)
Banggood warehouse is located in China. Coupons for DANIU BT-168D AA/AAA/C/D/9V/1.5V Battery Tester? Nope, there’re no coupons in Banggood. Low/high price? It’s a good price, isn’t it? The average is $6.39.
Link: Banggood product page
Price: $4.29
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG2e9929, BGc8c51b, BG20236Tool, BGTOOS729
(you can check these old coupons out, but these probably won’t work)
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 DANIU BT-168D AA/AAA/C/D/9V/1.5V Battery Tester is here. The lowest price was: $2.18.
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)).