$14.66 – Output Voltage: 4.35V ± 1% / 4.2V ± 1% / 3.7V ± 1% / 1.48V ± 1%, Input: DC 5V/2A 9V/2A 18W (MAX), 000mA*2 (MAX), QC Mode: 1, Output Current, Standard Mode: 1, 500mA*2 (MAX).
When I was updating this page the price was $14.66 for Nitecore UM2 Battery Charger (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood ($14.66)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. Is it cheap? Cool, average is $14.84, so current price is lower!
Link: Banggood product page
Price: $14.66
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG2434P, BGUM2, BGTBFL, BG13TH, BGF1111, fInbG2020, BGff2020, BGUM213, BGAFF10OFF, BGTT10, BGSM30%, bGhOnEy10, bgshOOp10, BGUM24, BG14TH26, BGTBD, BgcLuBofErtA10, BGCZ1111, BG1128, BGBFC06, BGCuponation10, BGNTUM42, BGNTUM, BG10OFFAFF1, BGUM4, BRANDNC, 502C6B, e2bcea, linepayflt, BGUM4A, BGNTUM4, BG1106YR, BGCZ1107, BG1106YB, BGBFC04, BGYW13, 13f142, BG10OFFAFF, BGwhielabel, BG330e37, 4BLF, BGJH37, BANGGOODSD, 6GSGIT, BGTorch4, BGYW82, BGdeals307, BGZUZU088, 00c906, BGYW91, BGJH56, BGtorch2, BGsmart088, BGtorch3, BGALIBUY085, BG6ff6f4, BGAlerabat15, BGtorch7, BGJH64, BG675bad, BGALIBUY088, BGAlerabatI, BGOutlight10, BG589b2e, BGd57765, BGTORCH10
(these coupons are old, so probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for Nitecore UM2 Battery Charger? There we go. The lowest price was: $13.92.
Price records source(s): Gearbest, 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)).