Does anyone know anything about these ?
Solarstorm B4 Charger
a rip off I4 charger 
Yes I was looking at the i4 but this is half the price and I need to charge 16 protected cells at once so would need 4, I’m not in a hurry to charge them As I have 20hrs in between use and can leave them in my works workshop that is manned.
So a slow charge is not a problem but I still want something safe
Brand: Solarstorm Name: B4 Color: Black
4 batteries simultaneously
3 charging modes (CC, CV and Trickle Charge)
3 Color LED displays charging progress for each battery.
Automatically detects battery status and selects the appropriate voltage and charge mode.
Automatically stops charging when complete.
Features reverse polarity protection.
This one: https://budgetlightforum.com/t/-/17848
Marsfire Charger
That’s great thank you, looks like it will be worth a punt, I’ll be sure to post a review