Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
Nominal Capacity 2530mAh, Charging Cut-off Voltage 0.02C, Max Discharging Current 18A, Discharging Cut-off Voltage 3.00V, Charging Current 1.00C, Minimum Capacity 2500mAh, Nominal Voltage 3.7v, Brand & Model Astrolux® E1825
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($61.59): FIN3376
2. ($65.75): BG589b2e
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGtorch9, FIN9952, F43376, BG6d4f94, BG8Alerabat, BGLED07, BGOutlight10
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for Astrolux EA01S 4x XHP50.2 Flashlight with 18650 Battery is here.
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)).