$33.50 – Charging Cut-off Voltage 0.02C, Charging Current 0.2C, Net weight 73 ± 2 g, Size / Length 70.9 ± 0.20 mm, Nominal Capacity 5000mAh, Discharging Cut-off Voltage 2.50V, Discharging Current 15A, Size / Diameter 21.7 ± 0.20 mm, Nominal Voltage 3.7v, Operate Temperature / Discharge -20℃~40℃, Brand & Model Astrolux® C2150, Name Astrolux® C2150 3C 21700 Battery, Operate Temperature / Charge 0℃~45℃, Storage Temperature -20℃~20℃, Internal Resitance ＜10mΩ.
According to my DB the lowest price is $33.5 for 4x Astrolux C2150 5000mAh 3C 3.7V 21700 Battery 15A (in Banggood). Get coupons, create price alert or check price history out! Do you want to know what the best price is?
Latest price update (UTC time):
Banggood ($33.50)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Is it a low price? From what I can see this price is higher than average price ($21.91).
Link: Banggood product page
Price: $33.5
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGABA, BGAST25, BGDEALS06, BGAFF10OFF, BGCuponation10, 4BLF, BG10OFFAFF, cbrIDgTec, BG10OFFAFF1, BGFLBA, BANGGOODSD, BGTorch4, 00c906, BGtorch2, BGtorch3, BGtorch7, BGAlerabatI, BGtorch9, BG8Alerabat, BG3f1f8e, BGLED07, BGCMP340
(you can check these old coupons out, but these 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 4x Astrolux C2150 5000mAh 3C 3.7V 21700 Battery 15A? There we go. The lowest price was: $18.74.
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)).