End-of-charge Current: 0.02C5A (At CV mode), Standard Discharge: CC, End-of-discharge Voltage: 2.50 V, 4.20V, Typical Capacity: 4800mAh, Minimum capacity: 4700mAh, Standard Charge: CC/CV, Nominal voltage: 3.7V, 0.2C5A, 0.2C5A, 2.50V, End-of-charge Voltage: 4.20V±0.05V.
Go down and check coupons out. Remember to check price history if it is available. Best price?
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.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
1. ($24.60): BANGGOODSD
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): AC18, 502C6B, AC19, BGCuponation10, 4BLF, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BGFLBA
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for 2x GETEED 3.7v 4800mAh 35A 21700 20700 Battery is here. The lowest price was: $14.27.
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)).