Aliexpress
Click here… to search for TOMO T4 18650 Battery Charger on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There are no coupons available at this moment 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!
Old coupons (from the oldest to the newest): aff7off, e2bcea, 2019SPEDM, BG3CSUM, bgssaff9, BGaDmITAd, bgchinafest, BGBFAFF2019, BGCITYADS2019, bGpAnDacHeCk, 2020CNY, 13f142, BGAFF7OFF, bGhOnEy10, BGXMI15, BG15POWERBANK, BGAFF10OFF, BGCuponation10, BGHONEY2110, BANGGOODSD
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for TOMO T4 18650 Battery Charger.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).