$14.24 – End-of-discharge Voltage 3.00 V, Storage temperature -5℃~35℃, Storage Humidity ≤75% RH, Net weight 70±2g, Nominal voltage 3.7V, Max Discharging Current 28A, Typical Capacity 4500mAh, Weight Approx: 70±2g, Minimum capacity 4000-4500mAh, Size / Length 71±0.6mm, Item Astrolux® E2145 21700 Battery, Operating temperature “Charging: 0℃~45℃
Discharging: -20℃~60℃”, Size / Diameter 22±0.5mm.
You can get Astrolux E2145 4500mAh 28A 3.7V 21700 Battery Unprotected for $14.24 using coupon code (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Latest coupon code price check (UTC time):
Banggood ($14.24)
Banggood warehouse is located in China. I have no active coupons for you right now. Is it good price? Hmmm, price is higher than average (which is $11.41 right now), so better set price alert down below…
Link: Banggood product page
Price: $14.24
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGc3b644, BGOutlight10, BG589b2e, FIN1078, BGd57765, FIN7756
(these codes were not working in latest coupon update, but you can check them out anyway)
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 Astrolux E2145 4500mAh 28A 3.7V 21700 Battery Unprotected? There we go. The lowest price was: $9.48.
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)).