I have checked all old coupons and price is 11.99 USD for 3.7V 21700 (in Banggood). Get coupons, create price alert or check price history out! Do you want to know what the best price is?
Latest price update (UTC time):
Banggood (11.99 USD)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Low/high price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal 11.79 USD)
Link: Banggood product page
Price: 11.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGc3b644, BGOutlight10, BG589b2e, FIN1078, BGd57765, FIN7756
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
Click here… to search for Astrolux E2145 4500mAh 28A 3.7V 21700 Battery Unprotected on Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Astrolux E2145 4500mAh 28A 3.7V 21700 Battery Unprotected.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).