Check if there is $11.23 coupon for Astrolux E1825 2500mAh 18A 3.7V 18650 Li-ion Battery Unprotected (in Banggood). Just check coupons out (with price alert and history). Best price?
Latest coupon code price check (UTC time):
1Pcs Astrolux® E1825 2500mAh 18A 3.7V 18650 Li-ion Battery Unprotected High Drain Rechargeable Lithium Power Cell For Jetbeam Nitecore Lumintop Fenix Olight Flashlights FPV RC Toys E-bikes
Banggood ($11.23)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Good or bad price? Well, this price is higher than average price ($8.49)
Link: Banggood product page
Price: $11.23
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): FIN1097, BG589b2e, BGd57765, FIN9890
(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
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 Astrolux E1825 2500mAh 18A 3.7V 18650 Li-ion Battery Unprotected.
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)).