Just check coupons out (with price alert and history). You probably want to know what is the best price?
Battery type: 18650 (With board protected by PCB), Voltage: 3.7 V, Type of cell: Li-ion, Capacity: 3200-3300 Mah
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 and price update (UTC):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
1. ($24.77): BGSF
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): FIN3400, linepayflt, EYBG, BGBSPX, BGTORCH, 502C6B, BGBFCR41, fInbG2020, BGff2020
(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 4x Sofirn 3.7V 3400mah 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)).