Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
XTAR Power Bank 18650 Battery Charger PB2S | 25.81 USD | Paste $2/2,01 coupon “GXFWZ0O88I23” in the cart |
 |
LiitoKala Lii-MP2 18650 21700 Battery Charger Power Bank QC3.0 Case | 46.72 USD | Paste “05CD03 or CDPU03 or FRCD03 or CDES03 or CDEW03 or AE3ZNAFEU or USAFF3” (may not work) |
 |
Nitecore LR60 18650/21700 Camping Flashlight Power Bank Charger | 96.38 USD | Paste “05CD08 or CDPU08 or FRCD08 or CDES08 or CDEW08 or AE8ZNAFEU or USAFF8” (may not work) |
More on Aliexpress… Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): e2bcea, aff7off, BG3CSUM, BGaDmITAd, bgchinafest, BGBFAFF2019, BGCITYADS2019, 2020CNY, BGVDay10%off, BGAFF7OFF, bGhOnEy10, BGXMI15, BGdragonBoat, BGSS10%SW, BGAFF10OFF, BgoFErTaSchInA10, BgcLuBofErtA10, BGHONEY2110, BANGGOODSD
(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
Here is price history (for all/most countries) for 18650 Power Bank DIY Case.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).
The coupon is only available for new users.