Updated: 10-01-2026.
21700 battery
Banggood warehouse: China.
Discount price $36.99 with coupon: F6062
Discount price $36.99 with coupon: M7151
Discount price $37.99 with coupon: BGAME3
Discount price $42.36 with coupon: BGSM30%
Discount price $42.36 with coupon: cbrIDgTec
Discount price $42.36 with coupon: BGTORCH
Additional Banggood coupons:
1. First page
2. Second page
Aliexpress
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Price history and price alert
Here is price history (for all/most countries) for Amutorch E3 3x XPL HI/SST20 Flashlight. The lowest price was: $35.16.
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)).