Nuprol make nothing, they just add their stickers to other companies products and add a chunk onto the RRP for the privilege.
Here is a manual for the same charger, with another sticker/logo on it.
https://www.overlander.co.uk/pub/media/downloads/VSRmini_Manual_V3.pdf
Your settings for this battery will be:
LiPo Balance Charge
1.4A
7.4v (2S)
Your battery has a mini-tamiya Connector - which won't work with this charger unless you
buy an adapter.
Once you receive said adapter, you will need to de-pin the wires on the mini-tamiya end (using a pin or the inside of a biro inner ink tube) and swap them over, reversing polarity for Airsoft use.
View attachment 92663
Once reversed, plug the yellow end into the yellow socket on the charger, connect the battery to the adapter's mini-tamiya connector, and the balance lead on the battery into the balance port on the charger.
View attachment 92664
Start charging and away you go. The charger will beep when it's finished, generally around an hour depending on how good the balance logic is and the condition of your LiPo's cells.
Really important - Never, ever, charge unattended. LiPo fires are not something to be taken lightly. I have seen garages and bedrooms gutted by LiPo fires local to me. It's very rare, but you don't want to set a battery on charge, pop out for 10minutes, and come back to your house burning down. There are safety products, such as LiPo bags, to use while you are charging if you want some piece of mind.